◆苦は楽の種 Ku wa raku no tane.
- 解釈：現在の苦労が、将来の幸福の元になるという意。「楽は苦の種」と続く。
- Literal：Difficulties are comfortable seeds.
- Interpretation：He that will have the pleasure must endure the pain. The present difficulties become the origin of future happiness. After a storm comes a calm. No gains without pains.
- 類義：苦をせねば、楽はならず。