Effort only fully releases its reward after a person refuses to quit.

Just because something doesn't do what you planned it to do doesn't mean it's useless.

There are no secrets to success. It is the result of preparation, hard work, and learning from failure.

In this world nothing can be said to be certain, except death and taxes.

If one does not know to which port one is sailing, no wind is favorable.

Business, that's easily defined - it's other people's money.

Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.

It usually takes me more than three weeks to prepare a good impromptu speech.

Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.

If you cannot work with love but only with distaste, it is better that you should leave your work.