We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.

Plato

Everything we call real is made of things that cannot be regarded as real.

Niels Bohr

Loneliness can be conquered alone by those who can bear solitude. Let us dare to have solitude — to face the eternal, to find others, to see ourselves.

Paul Tillich

I want to sing like the birds sing, not worrying about who hears or what they think.

Rumi

If you're in the luckiest one per cent of humanity, you owe it to the rest of humanity to think about the other 99 per cent.

Warren Buffett

Conviction is much more powerful than "positive thinking".

The Stoic Emperor