The reason cannot grasp all truth in its embrace because truth is too infinite for it; but still it does grasp the something of it which we immediately need, and its insufficiency does not detract from the value of its work, but is rather the measure of its value.... Its inconstancy, its divisibility against itself, its power of sustaining opposite views are the whole secret of its value....

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To the Overmind ... all religions would be true as developments of the one eternal religion, all philosophies would be valid each in its own field as a statement of its own universe-view from its own angle, all political theories with their practice would be the legitimate working out of an Idea Force with its right to application and practical development in the play of the energies of Nature....

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All truths, even those which seem to be in conflict, have their validity.... All spiritual experiences are true, but they point towards some highest and widest reality which admits their truth and exceeds it. This is, we may say, a sign of the relativity of all truth and all experience.... But from another point of view this variety testifies rather to the infinity of aspects of the Infinite....

The truth of the spirit is a truth of being and consciousness and not a truth of thought: mental ideas can only represent or formulate some facet, some mind-translated principle or power of it or enumerate its aspects....

The Human Cycle, p. 122:

The reason cannot grasp all truth in its embrace because truth is too infinite for it; but still it does grasp the something of it which we immediately need, and its insufficiency does not detract from the value of its work, but is rather the measure of its value. For man is not intended to grasp the whole truth of his being at once, but to move towards it through a succession of experiences and a constant, though not by any means a perfectly continuous self-enlargement. The first business of reason then is to justify and enlighten to him his various experiences and to give him faith and conviction in holding on to his self-enlargings. It justifies to him now this, now that, the experience of the moment, the receding light of the past, the half-seen vision of the future. Its inconstancy, its divisibility against itself, its power of sustaining opposite views are the whole secret of its value. It would not do indeed for it to support too conflicting views in the same individual, except at moments of awakening and transition, but in the collective body of men and in the successions of Time that is its whole business. For so man moves towards the infinity of the Truth by the experience of its variety; so his reason helps him to build, change, destroy what he has built and prepare a new construction, in a word, to progress, grow, enlarge himself in his self-knowledge and world-knowledge and their works.

The Life Divine, pp. 298–299:

If we would understand the difference of this global Overmind Consciousness from our separative and only imperfectly synthetic mental consciousness, we may come near to it if we compare the strictly mental with what would be an overmental view of activities in our material universe. To the Overmind, for example, all religions would be true as developments of the one eternal religion, all philosophies would be valid each in its own field as a statement of its own universe-view from its own angle, all political theories with their practice would be the legitimate working out of an Idea Force with its right to application and practical development in the play of the energies of Nature. In our separative consciousness, imperfectly visited by glimpses of catholicity and universality, these things exist as opposites; each claims to be the truth and taxes the others with error and falsehood, each feels impelled to refute or destroy the others in order that itself alone may be the Truth and live: at best, each must claim to be superior, admit all others only as inferior truth-expressions. An overmental Intelligence would refuse to entertain this conception or this drift to exclusiveness for a moment; it would allow all to live as necessary to the whole or put each in its place in the whole or assign to each its field of realisation or of endeavour. This is because in us consciousness has come down completely into the divisions of the Ignorance; Truth is no longer either an Infinite or a cosmic whole with many possible formulations, but a rigid affirmation holding any other affirmation to be false because different from itself and entrenched in other limits. Our mental consciousness can indeed arrive in its cognition at a considerable approach towards a total comprehensiveness and catholicity, but to organise that in action and life seems to be beyond its power. Evolutionary Mind, manifest in individuals or collectivities, throws up a multiplicity of divergent view-points, divergent lines of action and lets them work themselves out side by side or in collision or in a certain intermixture; it can make selective harmonies, but it cannot arrive at the harmonic control of a true totality.

The Life Divine, pp. 487–488:

All truths, even those which seem to be in conflict, have their validity, but they need a reconciliation in some largest Truth which takes them into itself; all philosophies have their value,—if for nothing else, then because they see the Self and the universe from a point of view of the spirit’s experience of the many-sided Manifestation and in doing so shed light on something that has to be known in the Infinite. All spiritual experiences are true, but they point towards some highest and widest reality which admits their truth and exceeds it. This is, we may say, a sign of the relativity of all truth and all experience, since both vary with the outlook and the inlook of the knowing and experiencing mind and being; each man is said to have his own religion according to his own nature, but so too each man may be said to have his own philosophy, his own way of seeing and experience of existence, though only a few can formulate it. But from another point of view this variety testifies rather to the infinity of aspects of the Infinite; each catches a partial glimpse or a whole glimpse of one or more aspects or contacts or enters into it in his mental or his spiritual experience.

The Life Divine, pp. 920–921:

The truth of the spirit is a truth of being and consciousness and not a truth of thought: mental ideas can only represent or formulate some facet, some mind-translated principle or power of it or enumerate its aspects, but to know it one has to grow into it and be it; without that growing and being there can be no true spiritual knowledge. The fundamental truth of spiritual experience is one, its consciousness is one, everywhere it follows the same general lines and tendencies of awakening and growth into spiritual being; for these are the imperatives of the spiritual consciousness. But also there are, based on those imperatives, numberless possibilities of variation of experience and expression: the centralisation and harmonisation of these possibles, but also the intensive sole following out of any line of experience are both of them necessary movements of the emerging spiritual Conscious-Force within us. Moreover, the accommodation of mind and life to the spiritual truth, its expression in them, must vary with the mentality of the seeker so long as he has not risen above all need of such accommodation or such limiting expression. It is this mental and vital element which has created the oppositions that still divide spiritual seekers or enter into their differing affirmations of the truth that they experience. This difference and variation is needed for the freedom of spiritual search and spiritual growth: to overpass differences is quite possible, but that is most easily done in pure experience; in mental formulation the difference must remain until one can exceed mind altogether and in a highest consciousness integralise, unify and harmonise the many-sided truth of the Spirit.