When you relieve the suffering of others, you will feel happier, more optimistic, less lonely, and less inclined to think negative thoughts.
فَبِحَسَبِ ٱلْخُبَرَاءِ فِي عِلْمِ ٱلنَّفْسِ ،‏ تَتَحَسَّنُ صِحَّتُنَا وَعَلَاقَتُنَا بِٱلْآخَرِينَ .‏