This prayer shows what the prophet thought of himself.
Bukhari:V4B52N143
"The Prophet told an Ansar, 'Choose one of your slave boys to serve me in my expedition to Khaybar.' So, he chose me, even though I was just nearing puberty. I served Muhammad when he stopped to rest. I heard him saying repeatedly, 'Allah! I seek refuge with you from distress and sorrow, from helplessness and laziness, from miserliness and cowardice, from being heavily in debt and from being overcome by men.'"