Note 3 at Lk. 21:19: The context of this statement is about persecution (vv. 12-17) and the compensation for enduring it that we will receive in the resurrection (see note 2 at Lk. 21:18, above). So the patience that Jesus is speaking of here is the calm assurance that God knows every hurt that we feel and He will abundantly recompense us (Heb. 11:26) in the resurrection. This knowledge enables us to dominate our emotions in the face of persecution (i.e. possess our souls) instead of letting our emotions of fear dominate us.