To have the management of the mind is a great art, and it may be attained in a considerable degree by experience and habitual exercise...Let him take a course of chemistry, or a course of rope-dance, or a course of any thing to which he is inclined at the time. Let him contrive to have as many retreats for his mind as he can, as many things to which it can fly from itself.

The Life of Samuel Johnson, LL. D., Comprehending an Account of His Studies, and Numerous Works, in Chronological Order (ed. 1824)