Love overhot soon cools. [ Scotch Proverb ]

When the pot boils over it cools itself. [ Proverb ]

Absence cools moderate passions, but inflames violent ones. [ Proverb ]

There is a magic in the word duty, something I know not what, which sustains magistrates, inflames warriors, and cools married people. [ H. Dupuy ]

Grief, like night, is salutary. It cools down the soul by putting out its feverish fires; and if it oppresses her, it also compresses her energies. The load once gone, she will go forth with greater buoyancy to new pleasures. [ Dr. Pulsford ]