Then were there two thieves crucified with him, one on the right hand, and another on the left.
All Commentaries on Matthew 27:38 Go To Matthew 27
Hilary of Poitiers
AD 368
Thus on the tree of life the salvation and life of all is suspended.
Or otherwise; Two thieves are set up on His right and left hand, to signify that the entire human race is called to the Sacrament of the Lord’s Passion; but because there shall be a division of believers to the right, and unbelievers to the left, one of the two who is set on His right hand is saved by the justification of faith.