From the Upanishads

I have found them wise, beyond all others; and, beyond all others, filled with that very light which makes all things new; the light discovered first within, in the secret place of the heart, and which brimming over there fills the whole of life, lightening every dark and clouded way. That glowing heart within us, we are beginning to guess, is the heart of all things, the everlasting foundation of the world; and because speech is given therein to that teaching of oneness, of our hearts and the heart eternal as eternally one, I have translated the last of these three passages from the books of Wisdom.