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.

Great discoveries and improvements invariably involve the cooperation of many minds. I may be given credit for having blazed the trail, but when I look at the subsequent developments I feel the credit is due to others rather than to myself.

Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus.

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.

One day there will be a telephone in every major city in the USA

The achievement of one goal should be the starting point of another.

The nation that secures control of the air will ultimately control the world.