明日复明日，明日何其多。我生待明日，万事成蹉跎。
Tomorrow and tomorrow, how many tomorrows there are! If I live waiting for tomorrow, all things will be wasted.
—— 钱福
Source: 明日歌(Song of Tomorrow)
Background
From "Tomorrow Song" by Wen Jia of the Ming Dynasty, a poem advising people not to procrastinate.
Interpretation
Always postponing things to tomorrow, and tomorrow to the day after, will never lead to results. One should complete today's tasks today and not procrastinate.