Robert E Lee quotes (even though he was a Confederate soldier, there is much that his countrymen and enemies and people in the present could learn from him):

It is well that war is so terrible, otherwise we should grow too fond of it.

Never do a wrong thing to make a friend or to keep one.

Duty then is the sublimest word in the English language. You should do your duty in all things. You can never do more, you should never wish to do less.

The education of a man is never completed until he dies.

I cannot trust a man to control others who cannot control himself.

The devil's name is dullness.

Obedience to lawful authority is the foundation of manly character.

A true man of honor feels humbled himself when he cannot help humbling others.

I have been up to see the Congress and they do not seem to be able to do anything except to eat peanuts and chew tobacco, while my army is starving.

What a cruel thing war is... to fill our hearts with hatred instead of love for our neighbors.

In this enlightened age, there are few I believe, but what will acknowledge, that slavery as an institution, is a moral & political evil in any Country.

Save for defense of my native state, I never desire again to draw my sword.

I have fought against the people of the North because I believed they were seeking to wrest from the South its dearest rights. But I have never cherished toward them bitter or vindictive feelings, and I have never seen the day when I did not pray for them.

The war... was an unnecessary condition of affairs, and might have been avoided if forebearance and wisdom had been practiced on both sides.

Madam, don't bring up your sons to detest the United States government. Recollect that we form one country now. Abandon all these local animosities, and make your sons Americans.