A quote
Do you not see how different is the method of descending a mountain from that employed in climbing upwards? Men coming down a slope bend backwards; men ascending a steep place lean forward. For, my dear Lucilius, to allow yourself to put your body’s weight ahead when coming down, or, when climbing up, to throw it backward is to comply with vice. The pleasures take one down hill but one must work upwards toward that which is rough and hard to climb; in the one case let us throw our bodies forward, in the others let us put the check-rein on them.
Seneca·Letter 123 — On the Conflict Between Pleasure and Virtue (§14)·trans. Gummere