There is nothing harder than the softness of indifference.
—Juan Montalvo (1832–89) Ecuadorian Author, Essayist
Nothing for preserving the body like having no heart.
—Jean Antoine Petit-Senn (1792–1870) Swiss Poet
Lukewarmness I account a sin, as great in love as in religion.
—Abraham Cowley (1618–67) English Poet, Essayist
The worst sin towards our fellow creatures is not to hate them, but to be indifferent to them: That’s the essence of inhumanity.
—George Bernard Shaw (1856–1950) Irish Playwright