A thief is one who takes something that is not theirs in a sneaky way or by force. A thief can steal a number of things and represent the devil.
Positive: Dreaming of a thief stealing your things could represent that a double blessing is being restored to you.
Negative: Seeing a thief in your dream could symbolize that the enemy is trying to take your blessing.
(John 10:10; Exodus 22:7; Job 24:14).