Faith always contains an element of risk, of venture; and we are impelled to make the venture by the affinity and attraction which we feel in ourselves.
Faith is an act of rational choice, which determines us to act as if certain things were true, and in the confident expectation that they will prove to be true.
The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, skepticism is the highest of duties; blind faith the one unpardonable sin.