Purity, patience, and perseverance are the three essentials to success and, above all, love.

Every action has its pleasures and its price.

The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence.

One must be sane to think clearly, but one can think deeply and be quite insane.

When you play, play hard; when you work, don't play at all.

I will prepare and some day my chance will come.

Make the lie big, make it simple, keep saying it, and eventually they will believe it

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!

When asked, 'How do you write?' I invariably answer, 'one word at a time.'

One of the main weaknesses of mankind is the average man's familiarity with the word 'impossible'.

The only 'break' anyone can afford to rely upon is a self-made 'break'.

Price is what you pay. Value is what you get.

Thinking is the hardest work there is, which is probably the reason so few engage in it.

You don't get paid for the hour. You get paid for the value you bring to the hour.

It is a cursed evil to any man to become as absorbed in any subject as I am in mine

Find out what you really love to do, and then find a way to make a good living doing it.

Inspiration exists, but it has to find you working.

Success is not to be pursued; it is to be attracted by the person you become

Be quick, but don't hurry.

For the bureaucrat, the world is a mere object to be manipulated by him.

Chop your own wood and it will warm you twice