Then old age and experience, hand in hand, — Reason

"REASON, v.i. To weight probabilities in the scales of desire."

"…He is a weak ruler who needs religion to uphold his government; it is as if he would catch his people in a trap. My people are going to learn the principles of democracy, the dictates of truth and the teachings of science. Superstition must go. Let them worship as they will; every man can follow his own conscience, provided it does not interfere with sane reason or bid him against the liberty of his fellow-men."

"Reason is omnivorous; it does not pasture exclusively in scientific fields."

"Reason always stands in need of being purified by faith"

"Reason may be employed in two ways to establish a point: firstly, for the purpose of furnishing sufficient proof of some principle, as in natural science, where sufficient proof can be brought to show that the movement of the heavens is always of uniform velocity. Reason is employed in another way, not as furnishing a sufficient proof of a principle, but as confirming an already established principle, by showing the congruity of its results, as in astrology the theory of eccentrics and epicycles is considered as established, because thereby the sensible appearances of the heavenly movements can be explained; not, however, as if this proof were sufficient, forasmuch as some other theory might explain them."

"Religion passes out of the ken of reason only where the eye of reason has reached its own horizon; faith is then but its continuation, even as the day softens away into the sweet twilight; and twilight, hushed and breathless, steals into the darkness."