When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.
A day dawns, quite like other days; in it, a single hour comes, quite like other hours; but in that day and in that hour the chance of a lifetime faces us.
Man is not the creature of circumstances, circumstances are the creature of man. We are free agents, and man is more powerful than matter.
Life is not holding a good hand; Life is playing a poor hand well.
The proper function of man is to live, not to exist. I shall not waste my days in trying to prolong them. I shall use my time.
Never neglect an extraordinary appearance or happening. It may be -- usually is, in fact -- a false alarm that leads to nothing, but it may on the other hand be the clue provided by fate to lead you to some important advance.
People are always blaming their circumstances for what they are. I don't believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and, if they can't find them, make them.
If I have ever made any valuable discoveries, it has been owing more to patient attention than to any other talent.
I would rather have a mind opened by wonder than one closed by belief.
When your work speaks for itself, don't interrupt.