Washington is no place in which to carry out inventions
With every door that closes a new one opens.
Before anything else, preparation is the key to success.
What this power is I cannot say; all I know is that it exists and it becomes available only when a man is in that state of mind in which he knows exactly what he wants and is fully determined not to quit until he finds it.
Night is a more quiet time to work. It aids thought.
Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus.