Faith in God. Although Samson often failed during his life, he remembered his God at the end of his life, and slew more of the enemies of God in his death than in his life.
Judges 16:30 So the dead whom he killed at his death were more than those whom he had killed during his life.
Like Jesus, Samson shed his blood in the fight against sin and is recorded in Hebrews as one of the great cloud of witnesses. Hebrews 11:32 & Hebrews 12:1.