Inspiration from the Truth purifies by getting rid of all falsehood, for all sin according to the Indian idea is merely falsehood, wrongly inspired emotion, wrongly directed will and action. The central idea of life and ourselves from which we start is a falsehood and all else is falsified by it. Truth comes to us as a light, a voice, compelling a change of thought, imposing a new discernment of ourselves and all around us. Truth of thought creates truth of vision and truth of vision forms in us truth of being, and out of truth of being (satyam) flows naturally truth of emotion, will and action. This is indeed the central notion of the Veda.
Ref: The Secret of the Veda