Failure is really a matter of conceit. People don't work hard because, in their conceit, they imagine they'll succeed without ever making an effort. Most people believe that they'll wake up some day and find themselves rich. Actually, they've got it half right, because eventually they do wake up.

Success is the result of hard work.

Waste is worse than loss. The time is coming when every person who lays claim to ability will keep the question of waste before him constantly. The scope of thrift is limitless.

Of the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.

Invention is 10% inspiration and 90% perspiration.

Accomplishing something provides the only real satisfaction in life.

I have never seen the slightest scientific proof of the religious ideas of heaven and hell, of future life for individuals, or of a personal God.