You may have to fight a battle more than once to win it.

You can observe a lot just by watching.

If A is success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut.

Be quick, but don't hurry.

Our fatigue is often caused not by work, but by worry, frustration and resentment

By failing to prepare, you are preparing to fail.

Old Professors never die, they just lose their faculties.

You've got to be very careful if you don't know where you're going, because you might not get there.

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

If you wish success in life, make perseverance your bosom friend, experience your wise counselor, caution your elder brother and hope your guardian genius.

Boredom is one of the most blissful feelings.

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

If it's me against 48, I feel sorry for the 48.

Whosoever desires constant success must change his conduct with the times.

I do know that when I am 60, I should be attempting to achieve different personal goals than those which had priority at age 20.

Never make excuses. Your friends don't need them and your foes won't believe them.

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

I'm not the smartest fellow in the world, but I can sure pick smart colleagues.

You can't just ask customers what they want and then try to give that to them. By the time you get it built, they'll want something new.

We don't know a millionth of one percent about anything.

The world does not pay men for that which they 'know'. It pays them for what they do, or induce others to do.