Act as if what you do makes a difference. It does.

In order to disprove the assertion that all crows are black, one white crow is sufficient.

I myself believe that the evidence for God lies primarily in inner personal experiences.

Faith is one of the forces by which men live, and the total absence of it means collapse

Of course, this has its good side as well as its bad one. As we become permanent drunkards by so may separate drinks, so we become saints in the moral, and authorities and experts in the practical and scientific spheres, by so many separate acts and hours of work. Let no youth have any anxiety about the upshot of his education, whatever the line of it may be. If he keep faithfully busy each hour of the working day, he may safely leave the final result to itself.

Emotional occasions, especially violent ones, are extremely potent in precipitating mental rearrangements. The sudden and explosive ways in which love, jealousy, guilt, fear, remorse, or anger can seize upon one are known to everybody. . . . And emotions that come in this explosive way seldom leave things as they found them.

Act in earnest and you will become earnest in all you do.