Friendship is a pretty full-time occupation if you really are friendly with somebody You can t have too many friends because then you re just not really friends

Knowledge in the head and virtue in the heart, time devoted to study or business, instead of show and pleasure, are the way to be useful and consequently happy.

For all its accolades and celebrated recognition as sound guidance, I have personally noticed that sometimes, 'follow your heart,' is really bad advice.

Every human being, he believed, must do one of three basic things during his lifetime: leave something living, create something lovely, or make something better.

Accept criticism. If you do not offer your work for criticism and accept that criticism, meaning give it serious thought and attention, then you will never improve.

Focus your thoughts on what you want in every area of your life...the more you think and focus on something, the more you will bring energy to it and make it happen.

Now go and make interesting mistakes, make amazing mistakes, make glorious and fantastic mistakes. Break rules. Leave the world more interesting for your being here.

I cannot give any scientist of any age better advice than this: the intensity of the conviction that a hypothesis is true has no bearing on whether it is true or not.

Don't bother to ring a bell in the ear that doesn't listen. Move to another ear, and if he doesn't listen to your bell, sit back and listen to his nemesis.

If your clothes are enough to drive would-be friends away, they're not the kind of friends you want." Typical mother advice. Sweet, honest, and completely useless.

There is one thing you need to do to people who hate you for the way you are and what you do. What's that? The thing you do best. And that would be? Give them hell.

Never take advice about never taking advice. That is an old vice of men - to dish it out without being able to take it - the blind leading the blind into more blindness.

Don't go looking for boys in the darkThey will say pretty things thenleave you with scars.Do go looking for boys in the parkFor that is where the true gentlemen are.

The fulfilling life, the distinctive life, the relevant life is an achievement. To do whatever you do for no reason other than you love it and believe in its importance.

It's easy to look back and see it, and it's easy to give the advice. But the sad fact is, most people don't look beneath the surface until it's too late.