Pain past is pleasure.
[譯]過去的痛苦就是快樂。
People who cannot find time for recreation are obliged sooner or later to find time for illness.
[譯]騰不出時間娛樂的人,早晚會被迫騰出時間生病。
Perfect understanding will sometimes almost extinguish pleasure.
[譯]完全的理解有時幾乎會使樂趣消失。
Pleasure comes through toil.
[譯]苦盡甘來。
Pleasure is nothing else but the intermission of pain, the enjoying of something I am in great trouble for till I have it.
[譯]快樂不過是痛苦的間歇,享受之前要進行艱苦的努力。