野菜や果物を温室で育てれば、雨風の当たる日光の下で育てたものよりも、まずくなります。
これと同じように、人間もまた、温室で育てれば、厳しい環境下で育てた人よりも強くは育ちません。
本当の成長は、厳しい環境下でしかできないのです。
Anything that grows in a hothouse will taste bad.
Growing vegetables and fruits in the greenhouse is worse than what you brought up under the rain and daylight.
Just like this, if raised in a greenhouse,humans also will not grow stronger than those who were raised in harsh environments.
Real growth can only be done in harsh environments.