Hasan al-Basri

Someone asked Hasan al-Basri (رحمه الله) 

“What is the secret of your religiousness?”

He replied: “I understood 4 things:

1. I understood that my Rizq cannot be taken by anyone, so my heart became content.
2. I understood that no one can do my actions (worship) for me, so I started doing them myself.
3. I understood that Allah is watching me, so I became ashamed to do wrong.
4. I understood that death is waiting for me, so I started to prepare for my meeting with Allah.”