He who has never learned to obey cannot be a good commander.

It is during our darkest moments that we must focus to see the light.

Happiness depends upon ourselves.

Educating the mind without educating the heart is no education at all.

Adventure is worthwhile.

Patience is bitter, but its fruit is sweet.

Love is composed of a single soul inhabiting two bodies.

Education is an ornament in prosperity and a refuge in adversity.

Be a free thinker and don't accept everything you hear as truth. Be critical and evaluate what you believe in.

Knowing yourself is the beginning of all wisdom.

Criticism is something we can avoid easily by saying nothing, doing nothing, and being nothing.

Stop wasting your time over what you can’t control, make the most of what you can control and miracles are bound to happen.

Do not make yourself a bridge for everyone to cross on you, because there are some people they put nail on their feet to cross on you.

No matter how difficult you may think that your life is currently becoming, brighter days are always ahead waiting to embrace us, if we never dare to stop pressing forward.

Every man is enthusiastic at times. One man has enthusiasm for thirty minutes another man has it for thirty days. But it is the man who has it for thirty years who makes a success in life.

There's many a true word spoken in jest; scientists are abominably solemn; therefore scientists miss many a true word.

On the basis of my historical experience, I fully believe that mathematics of the 25th century will be as different from that of today as the latter is from that of the 16th century.

I'd rather be a creature of the night than an old dude.

We go lightheartedly on our way, never thinking that by a careless word or two we may have altered the whole course of human lives, for some person will take our advice and use it.

What I've been trying to do for years is to get the music played on a station other than jazz stations, you know, to expand the audience.

Political correctness is bad.