We do not really think, we are barely conscious, until something goes wrong.

The pragmatist knows that doubt is an art which hs to be acquired with difficulty.

Truth is that concordance of an abstract statement with the ideal limit towards which endless investigation would tend to bring scientific belief, which concordance the abstract statement may possess by virtue of the confession of its inaccuracy and one-sidedness, and this confession is an essential ingredient of truth.

We, one and all of us, have an instinct to pray; and this fact constitutes an invitation from God to pray.

It is not knowing, but the love of learning, that characterizes the scientific man.

Third, consider the insistency of an idea. The insistency of a past idea with reference to the present is a quantity which is less, the further back that past idea is, and rises to infinity as the past idea is brought up into coincidence with the present.

True science is distinctively the study of useless things. For the useful things will get studied without the aid of scientific men. To employ these rare minds on such work is like running a steam engine by burning diamonds.