What this power is, I cannot say... All I know is that it exists.

The most successful men in the end are those whose success is the result of steady accretion. It is the man who carefully advances step by step, with his mind becoming wider and wider - and progressively better able to grasp any theme or situation - persevering in what he knows to be practical, and concentrating his thought upon it, who is bound to succeed in the greatest degree.

There are two critical points in every aerial flight-its beginning and its end.

Ordinary people who know nothing of phonetics or elocution have difficulties in understanding slow speech composed of perfect sounds, while they have no difficulty in comprehending an imperfect gabble if only the accent and rhythm are natural.

Another discovery which came out of my investigation was the fact that when one gives his or her order to produce a definite result and stands by that order, it seems to have the effect of giving one what might be termed a second sight which enables him or her to see right through ordinary problems. What this power is I cannot say; all I know is that it exists and it becomes available only when one is in that state of mind in which he or she knows exactly what one wants and is fully determined not to quit until he or she finds it.

A man, as a general rule, owes very little to what he is born with - a man is what he makes of himself.

One day every major city in America will have a telephone.