أن تعبد الله كأنك تراه ،
فإن لم تكن تراه فإنه يراك
Shaykh Shah Mohammad Asadullah (may Allah have mercy on him) instructed his senior murid,
‘After every salah perform the muraqaba that Allah is watching me (and is aware of all my outer and inner thoughts and activities).
Do this for one minute.
Try to bring this to mind at other times also.’
Akes e Jamil, page 218, (220)