To love is to risk not being loved in return. To hope is to risk pain. To try is to risk failure, but risk must be taken because the greatest hazard in life is to risk nothing.

Efficiency is doing things right; effectiveness is doing the right things.

It is the duty of a student to get everything out of a teacher， and the duty of a teacher to get everything out of a student.

Every book is a journey, and every journey is a book.

I believe in love, but I also believe in protecting myself.

The universe is full of surprises, and we are just beginning to scratch the surface of understanding it.

Consciousness is the workshop of evolutionary success.