The truths of the ṛṣis are not evolved as the result of logical reasoning or systematic philosophy but are the products of spiritual intuition, dṛṣti or vision. Sarvepalli Radhakrishnan
Logical reasoning is an argument which we have with ourselves and which reproduces internally the features of a real argument. Jean Piaget
The supreme truths are neither the rigid conclusions of logical reasoning nor the affirmations of credal statement, but fruits of the soul's inner experience. Sri Aurobindo