Don't be dismayed by good-byes. A farewell is necessary before you can meet again. And meeting again, after moments or lifetimes, is certain for those who are friends.
Richard Bach

Never think that war, no matter how necessary, nor how justified, is not a crime.
Ernest Hemingway

To complain is always nonacceptance of what is. It invariably carries an unconscious negative charge. When you complain, you make yourself into a victim. When you speak out, you are in your power. So change the situation by taking action or by speaking out if necessary or possible; leave the situation or accept it. All else is madness.
Eckhart Tolle

Don't flatter yourselves that friendship authorizes you to say disagreeable things to your intimates. On the contrary, the nearer you come into relation with a person, the more necessary do tact and courtesy become.
Oliver Wendell Holmes, Sr.

I look upon death to be as necessary to our constitution as sleep. We shall rise refreshed in the morning.
Benjamin Franklin

Each man is good in His sight. It is not necessary for eagles to be crows.
Sitting Bull