It is indolence... Indolence and love of ease; a want of all laudable ambition, of taste for good company, or of inclination to take the trouble of being agreeable, which make men clergymen. A clergyman has nothing to do but be slovenly and selfish; read the newspaper, watch the weather, and quarrel with his wife. His curate does all the work and the business of his own life is to dine.
Gravitation cannot be held responsible for people falling in love. How on earth can you explain in terms of chemistry and physics so important a biological phenomenon as first love? Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.