The secret of success is constancy to purpose.
The superior man understands what is right; the inferior man understands what will sell.
Only you can control your future.
We don't know a millionth of one percent about anything.
It is no use saying 'we are doing our best.' You have got to succeed in doing what is necessary.
I've always found the second book in a series is the hardest to write.
I'm a greater believer in luck, and I find the harder I work the more I have of it
The best way to destroy an enemy is to make him a friend.
I am thankful to all those who said NO to me. It's because of them I did it myself.
Percentages are why I am rich.
Success means we go to sleep at night knowing that our talents and ablities were used in a way that served others.
What one has to do usually can be done.
To invent, you need a good imagination and a pile of junk.
From each according to his abilities, to each according to his needs.
It is hard to fail, but it is worse never to have tried to succeed.
Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.
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!
Don't ever promise more than you can deliver, but always deliver more than you promise.
Inspiration exists, but it has to find you working.
Because ideas have to be original only with regard to their adaptation to the problem at hand, I am always extremely interested in how others have used them...
Change yourself and your work will seem different.