Hello.

1. A quick glance at a stone can tell the truth, but you can get it by persevering carefully.;

2. If a person does not have perseverance in doing things, he will not succeed in anything. (Newton)

3. The edge of a sword comes from sharpening, the fragrance of plum blossoms comes from the bitter cold, and the iron pestle is ground into a needle. Hope it helps.