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

I was well motivated. What I wanted to do was work for myself. I had twenty two jobs before I started my business at the age of twenty three and I didn't want one more boss telling me what to do. So I was motivated simply because I didn't want a boss.

Study until twenty-five investigation until forty profession until sixty at which age I would have him retired on a double allowance.

Older fatherhood isn't all bad: testosterone rates drop about 1% per year as men age making them less reactive and more patient and a professionally established middle-aged man is likely to have more time and money to devote to his kids than a twenty-something who's just getting started.

It were a real increase of human happiness could all young men from the age of nineteen be covered under barrels or rendered otherwise invisible and there left to follow their lawful studies and callings till they emerged sadder and wiser at the age of twenty-five.

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

The lovely thing about being forty is that you can appreciate twenty-five-year-old men more.

If you haven't turned rebel by twenty you've got no heart if you haven't turned establishment by thirty you've got no brains!

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.