Quarrels would not last long if the fault was only on one side.

—La Rochefoucauld, 1665

Resentment kills a fool, and envy slays the simple.

—Book of Job, c. 600 BC

Envy and hatred are apt to blind the eyes and render them unable to behold things as they are.

—Margaret of Valois, c. 1600

Opposition is not necessarily enmity; it is merely misused and made an occasion for enmity.

—Sigmund Freud, 1930

The envious die not once, but as often as the envied win applause.

—Baltasar Gracián, 1647

Many need no other provocation to enmity than that they find themselves excelled.

—Samuel Johnson, 1751

I shall embrace my rival—until I suffocate him.

—Jean Racine, 1669

Enemies are so stimulating.

—Katharine Hepburn, 1969

An injury is much sooner forgotten than an insult.

—Philip Dormer Stanhope, 1746

Hoping for new friendship from old enemies is / Like expecting to find a rose in a furnace.

—Muhammad Baqir Najm-i Sani, 1612

Hate must make a man productive. Otherwise one might as well love.

—Karl Kraus, 1912

We die of comfort and by conflict live.

—May Sarton, 1953

Do we want laurels for ourselves most, / Or most that no one else shall have any?

—Amy Lowell, 1922