It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom. Each, in its utmost development, supposes a high degree of intimacy and heart-knowledge; each renders one individual dependent for the food of his affections and spiritual life upon another; each leaves the passionate lover, or the no less passionate hater, forlorn and desolate by the withdrawal of his object.

Nathaniel Hawthorne (1804–1864) American writer

The Scarlet Letter, ch. 14 “Conclusion” (1850)