For it is commonly said: accomplished labours are pleasant.

I do not like to repeat successes, I like to go on to other things.

Always bear in mind that your own resolution to succeed is more important than any other.

You gain strength, courage and confidence by every experience in which you really stop to look fear in the face.... You must do the thing you think you cannot do.

The finest task for an Engineer – to survey, to plan, to suggest resources and material, assemble them for task in hand, implement and produce results.

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

I've always found the second book in a series is the hardest to write.

Real success can only come if there is a change in our societies and in our economics and in our politics.

A man paints with his brains and not with his hands.

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

The major reason for setting a goal is for what it makes of you to accomplish it. What it makes of you will always be the far greater value than what you get.

Obstacles are those frightful things you see when you take your eyes off your goals.

Your most unhappy customers are your greatest source of learning.

Our greatest glory is not in never failing, but in rising up every time we fail.

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

Personally, I enjoy working about 18 hours a day. Besides the short catnaps I take each day, I average about four to five hours of sleep per night.

To copy others is necessary, but to copy oneself is pathetic

Once you start a working on something, don't be afraid of failure and don't abandon it. People who work sincerely are the happiest.

Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.

Do one thing at a time, and while doing it put your whole soul into it to the exclusion of all else.

Success is a lousy teacher. It seduces smart people into thinking they can't lose.