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

It is easier for a tutor to command than to teach.

Either you run the day or the day runs you.

There is one weakness in people for which there is no remedy. It is the universal weakness of lack of ambition.

Why, look at me. I've worked my way up from nothing to a state of extreme poverty.

The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather a lack in will.

Success comes to those who become success conscious. Failure comes to those who indifferently allow themselves to become failure conscious.

Listen if you want to be heard

The man who is swimming against the stream knows the strength of it.

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

This is the real secret of life - to be completely engaged with what you are doing in the here and now. And instead of calling it work, realize it is play.

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

You don't have to be great to start, but you have to start to be great

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.

Tell the audience what you're going to say, say it; then tell them what you've said.

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

Because ideas have to be original only with regard to their adaptation to the problem at hand, I am always extremely interested in how others have used them...

Well done is better than well said.

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

The best way to destroy an enemy is to make him a friend.

Every individual has his own style, his own way of presenting himself on and off the field.