What I cannot create, I do not understand.

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

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

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

For it is commonly said: accomplished labours are pleasant.

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

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.

By failing to prepare, you are preparing to fail.

Without work, all life goes rotten, but when work is soulless, life stifles and dies.

Thought, backed by strong desire, has a tendency to transmute itself into its physical equivalent.

Workers of the world unite; you have nothing to lose but your chains.

All my life I've had one dream, to achieve my many goals.

Either you run the day or the day runs you.

The secret of success is constancy to purpose.

Discipline is the bridge between goals and accomplishment.

You can't make souffle rise twice.

Success is never final. Failure is never fatal. It s courage that counts.

Please all, and you will please none.

Four things for success: work and pray, think and believe.

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

Talent hits a target no one else can hit; Genius hits a target no one else can see.