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

He who will not economize will have to agonize.

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.

If you think your teacher is tough, wait until you get a boss. He doesn't have tenure.

Earning happiness means doing good and working, not speculating and being lazy. Laziness may look inviting, but only work gives you true satisfaction.

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal.

A good objective of leadership is to help those who are doing poorly to do well and to help those who are doing well to do even better.

God sells us all things at the price of labor.

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

Whether it's Google or Apple or free software, we've got some fantastic competitors and it keeps us on our toes.

Success is most often achieved by those who don't know that failure is inevitable.

Lisa, if you don't like your job you don't strike. You just go in every day and do it really half-assed. That's the American way.

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

All your dreams can come true if you have the courage to pursue them

The way to screw up somebody's life is to give them what they want.

It is your decisions, and not your conditions, that determine your destiny.

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 mistake activity with achievement.

The leader of genius must have the ability to make different opponents appear as if they belonged to one category.

Change yourself and your work will seem different.

Listen if you want to be heard