Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.

At twenty years of age the will reigns at thirty, the wit and at forty, the judgment.

Any young man who is unmarried at the age of twenty one is a menace to the community.

I think that if I had grown up and had been in show business and the movies twenty five, thirty years earlier, I think I would have made a lot more musical movies.

I did a twenty foot print and John Cage is involved in that because he was the only person I knew in New York who had a car and who would be willing to do this.

I mean, I look at my dad. He was twenty when he started having a family, and he was always the coolest dad. He did everything for his kids, and he never made us feel like he was pressured. I know that it must be a great feeling to be a guy like that.

I am entirely certain that twenty years from now we will look back at education as it is practiced in most schools today and wonder that we could have tolerated anything so primitive.

I read the Odyssey because it was the story of a man who returned home after being absent for more than twenty years and was recognized only by his dog.

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At twenty a man is full of fight and hope. He wants to reform the world. When he is seventy he still wants to reform the world, but he know he can't.

A man who views the world the same at fifty as he did at twenty has wasted thirty years of his life.

I took a speed-reading course and read War and Peace in twenty minutes. It involves Russia.

I prayed for twenty years but received no answer until I prayed with my legs.

Golf is played by twenty million mature American men whose wives think they are out having fun.

Discussion in class, which means letting twenty young blockheads and two cocky neurotics discuss something that neither their teacher nor they know.

For one thing, I teach my students what my teacher for twenty years, Paul Gavert, told me, 'The voice follows... the voice follows everything about you... who you are.'

He who devotes sixteen hours a day to hard study may become at sixty as wise as he thought himself at twenty.