There is nothing permanent except change.

Heraclitus

A scholar who loves comfort is not fit to be called a scholar.

Confucius

Everyone is needed, but no one is necessary.

Bruce Coslet

The important thing is to not stop questioning. Curiosity has its own reason for existing.

Albert Einstein

The obstacle is the way.

Ryan Holiday

The more powerful and original a mind, the more it will incline towards the religion of solitude.

Aldous Huxley