The man who does not work for the love of work but only for money is likely to neither make money nor find much fun in life.

The best time to plant a tree was 20 years ago. The second best time is now.

If you start with nothing and end up with nothing, there’s nothing lost.

The diamond cannot be polished without friction, nor the man perfected without trials.

If hard work is the key to success, most people would rather pick the lock.

I never perfected an invention that I did not think about in terms of the service it might give others… I find out what the world needs, then I proceed to invent.

Action may not always bring happiness; but there is no happiness without action.