It is too late to grieve when the chance is past.
坐失良機,后悔已遲。
更多英語諺語
Venture a small fish to catch a great one.
Errors, like straws, upon the surface flow; he who would search for pearls must dive below.
Grasp the nettle and it won't sting you.
The more the well is used, the more water it gives.