Your most unhappy customers are your greatest source of learning.
One must be sane to think clearly, but one can think deeply and be quite insane.
Nothing will work unless you do.
Why, look at me. I've worked my way up from nothing to a state of extreme poverty.
It is no use saying 'we are doing our best.' You have got to succeed in doing what is necessary.
Vision without execution is just hallucination.
Every action has its pleasures and its price.
People refuse to take chances in business, because they fear the criticism which may follow if they fail.
The man who is swimming against the stream knows the strength of it.
Advertising is legalized lying.
Our greatest glory is not in never failing, but in rising up every time we fail.
Many people would no more think of entering journalism than the sewage business - which at least does us all some good.
For the bureaucrat, the world is a mere object to be manipulated by him.
To be clever enough to get all that money, one must be stupid enough to want it.
Only put off until tomorrow what you are willing to die having left undone
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
Whosoever desires constant success must change his conduct with the times.
It's a terrible thing to look over your shoulder when you are trying to lead - and find no one there
I fear not the man who has practiced 10,000 kicks once, but I fear the man who had practiced one kick 10,000 times.
Change yourself and your work will seem different.
You can't make souffle rise twice.