"外側にばかり目を向けて自分の幸福が外にあると思っている人間は、最終的に内側を見つめ直してその源が自分の内にあることを発見します。"

Simplified Meaning:

Many people think that their happiness depends on outside things like wealth, other people's opinions, or material possessions. They spend a lot of time and energy trying to get these things, believing they will make them happy. However, after a while, some realize that true happiness isn't found in these external things but comes from within themselves. For example, you might buy a new phone or car hoping it will make you feel great, and it might for a short time. But soon, you may find that this happiness fades and that real, lasting contentment comes from self-acceptance, good relationships, and personal growth. Instead of always looking for happiness from the outside, focusing on developing inner qualities like gratitude, kindness, and self-love can lead to deeper, more lasting joy.