God sells us all things at the price of labor.

There is nothing impossible to him who will try.

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.

Choose a job you love and you will never have to work a day of your life.

The production of too many useful things results in too many useless people.

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

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

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.

I have not failed. I've just found 10,000 ways that won't work.

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

One of the greatest discoveries a person makes, one of their great surprises, is to find they can do what they were afraid they couldn't do.

True progress quietly and persistently moves along without notice.

It's a terrible thing to look over your shoulder when you are trying to lead - and find no one there

I`d like to live as a poor man with lots of money.

To invent, you need a good imagination and a pile of junk.

Few things are impossible to diligence and skill. Great works are performed not by strength, but perseverance.

Work does not kill a man, it is worry, irregularity and uncertainty that kill.

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

I never pick up an item without thinking of how I might improve it.

A creative man is motivated by the desire to achieve, not by the desire to beat others.

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