I totally agree..... Depression comes into those people's lives that are faithless. Faith is the greatest anti-depressant, it gives you something forward to look to. Being a Muslim, I know that I will be reunited with loved ones that I lost or will lose in the future and I also have faith in my lord that he is the Most-Gracious, the Most-Merciful.
For as long as I can remember, my family and I have been struggling with many things. Even today, I'm stressed the hell out about something but Im so used it by now that I say "Shukar-Alhumdulillah" even in the most testing times.
This Ayah keeps me going no matter what-
"But those who believe and work righteousness,- no burden do We place on any soul, but that which it can bear,- they will be Companions of the Garden, therein to dwell (for ever)."- 7:42