Inspiration exists, but it has to find you working.
There is one weakness in people for which there is no remedy. It is the universal weakness of lack of ambition.
This is the real secret of life - to be completely engaged with what you are doing in the here and now. And instead of calling it work, realize it is play.
It is a cursed evil to any man to become as absorbed in any subject as I am in mine
One of the main weaknesses of mankind is the average man's familiarity with the word 'impossible'.
Dad, you've done a lot of great things, but you're a very old man, and old people are useless.
One must be sane to think clearly, but one can think deeply and be quite insane.
To those whom much is given, much is expected.
Art calls for complete mastery of techniques, developed by reflection within the soul.
I've always found the second book in a series is the hardest to write.
Anticipate the difficult by managing the easy
If you think your teacher is tough, wait until you get a boss. He doesn't have tenure.
The best way to destroy an enemy is to make him a friend.
There is nothing more difficult to carry out, nor more doubtful of success, nor more dangerous to handle, that to institute a new order of things
You can observe a lot just by watching.
You don't have to be great to start, but you have to start to be great
The way to get started is to quit talking and begin doing.
If you're bored with life, if you don't get up every morning with a burning desire to do things, you don't have enough goals.
People refuse to take chances in business, because they fear the criticism which may follow if they fail.
Formulate and stamp indelibly on your mind a mental picture of yourself as succeeding. Hold this picture tenaciously and never permit it to fade. Your mind will seek to develop this picture!
A great secret of success is to go through life as a man who never gets used up.