Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside and something else will take its place. If I quit, however, it lasts forever.

Pain is immune to empathy...like love.

Pain and pleasure like light and darkness, succeed each other.

An hour of pain is as long as a day of pleasure.

Even pain has its joy.

Pain is such an uncomfortable feeling that even a tiny amount of it is enough to ruin every enjoyment.

Top results are achieved only through pain. But eventually you like this pain.