What must I do vs Your faith

I was studying in Mark 10 today.  There was a rich man who asked Jesus what he must do to gain eternal life.  That is the wrong question.  None of us can do anything.  Jesus did it all when He paid our ransom on the cross.  (Mark 10:45).  Then Bartimaeus begged Jesus to heal him.  People tried to keep him from Jesus but he begged even louder.  Jesus then healed him and said your faith has healed you. (Mark 10:52).  So what part do we play?  The reality is none of us are capable of saving ourselves.   But we must have faith in the one who can.