The means by which we live have outdistanced the ends forwhich we live. Our scientific power has outrun our spiritual power. We haveguided missiles and misguided men.
The exercise of power is determined by thousands ofinteractions between the world of the powerful and that of the powerless, allthe more so because these worlds are never divided by a sharp line: everyonehas a small part of himself in both.
If you are distressed by anything external, the pain isnot due to the thing itself but to your own estimate of it; and this you havethe power to revoke at any moment.