Chinese

		to be accustomed to; to be in the habit of	finish; complete; accomplish finish; complete; accomplish; become; turn into; win; succeed; one tenth	nature; the natural world
trad. (習慣成自然)		習慣	成	自然
simp. (习惯成自然)		习惯	成	自然

Proverb

習慣成自然

1. When you make it a habit, it will become second nature.