Irrationally held truths may be more harmful than reasoned errors.

If a man cannot see a church, it is preposterous to take his opinion about its altar-piece or painted window.

There is but one right, and the possibilities of wrong are infinite.

Life is like walking along a crowded street--there always seem to be fewer obstacles to getting along on the opposite pavement--and yet, if one crosses over, matters are rarely mended.

The only objections that have occurred to me are, 1st that you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly. . . . And 2nd, it is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all. However, I must read the book two or three times more before I presume to begin picking holes.

People may talk about intellectual teaching, but what we principally want is the moral teaching.

The rung of a ladder was never meant to rest upon, but only to hold a man's foot long enough to enable him to put the other somewhat higher.