The two enemies of human happiness are pain and boredom.
Arthur Schopenhauer

Beware of no man more than of yourself; we carry our worst enemies within us.
Charles Spurgeon

A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms agains himself. He makes his failure certain by himself being the first person to be convinced of it.
Ambrose Bierce

Ambition. An overmastering desire to be vilified by enemies while living and made ridiculous by friends when dead.
Ambrose Bierce

Let us carefully observe those good qualities wherein our enemies excel us; and endeavor to excel them, by avoiding what is faulty, and imitating what is excellent in them.
Plutarch

The Bible tells us to love our neighbors, and also to love our enemies; probably because generally they are the same people.
Gilbert K. Chesterton

We make our friends; we make our enemies; but God makes our next door neighbour.
Gilbert K. Chesterton

Progress is a nice word. But change is its motivator. And change has its enemies.
Robert Kennedy

Monarchs ought to put to death the authors and instigators of war, as their sworn enemies and as dangers to their states.
Elizabeth I

Give us grace and strength to forbear and to persevere. Give us courage and gaiety and the quiet mind, spare to us our friends, soften to us our enemies.
Robert Louis Stevenson

If we could read the secret history of our enemies we should find in each man's life sorrow and suffering enough to disarm all hostility.
Henry Wadsworth Longfellow

Method is more important than strength, when you wish to control your enemies. By dropping golden beads near a snake, a crow once managed To have a passer-by kill the snake for the beads.
Henry Wadsworth Longfellow

Whoever benefits his enemy with straightforward intention that man's enemies will soon fold their hands in devotion.
Henry Wadsworth Longfellow

People crushed by laws, have no hope but to evade power. If the laws are their enemies, they will be enemies to the law; and those who have most to hope and nothing to lose will always be dangerous.
Edmund Burke

War is the remedy that our enemies have chosen, and I say let us give them all they want.
William Tecumseh Sherman

Enemies are so stimulating.
Katharine Hepburn

I have had a lot of adversaries in my political life, but no enemies that I can remember.
Gerald R. Ford

Lovers may be - and indeed generally are - enemies, but they never can be friends, because there must always be a spice of jealousy and a something of Self in all their speculations.
Lord Byron

It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.
J. K. Rowling

I have written on all sorts of subjects... yet I have no enemies; except indeed all the Whigs, all the Tories, and all the Christians.
David Hume