The surest way to keep a secret is to make people believe they already know the answer.
The problem of leadership is inevitably: Who will play God?" Muad'Dib
If you rely only on your eyes, your other senses weaken.
The best contribution one can make to humanity is to improve oneself.
If all those around you believe some particular thing, you will soon be tempted to share in that belief.
To suspect your own mortality is to know the beginning of terror, to learn irrefutably that you are mortal is to know the end of terror.