Conscience is merely our own judgment of the right or wrong of our actions, and so can never be a safe guide unless enlightened by the word of God.

One of the great lessons the fall of the leaf teaches, is this: do your work well and then be ready to depart when God shall call.

There is nothing so elastic as the human mind. The more we are obliged to do, the more we are able to accomplish.

Accuracy is the twin brother of honesty; inaccuracy is a near kin to falsehood.

Science has sometimes been said to be opposed to faith, and inconsistent with it. But all science, in fact, rests on a basis of faith, for it assumes the permanence and uniformity of natural laws - a thing which can never be demonstrated.

Some of the best lessons we ever learn we learn from our mistakes and failures. — The error of the past is the wisdom and success of the future.

He that never changes his opinions, never corrects his mistakes, will never be wiser on the morrow than he is today.