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.

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.

I find out what the world needs. Then I go ahead and try to invent it

Success is 90% perspiration and 10% inspiration!

As a cure for worrying, work is far better than whiskey. I always found that, if I began to worry, the best thing I could do was focus upon doing something useful and then work very hard at it. Soon, I would forget what was troubling me.

I never knew I had an inventive talent until Phrenology told me so. I was a stranger to myself until then!

Sticking to it is the genius.