By Richard Sibbes
God calls him here his servant. Christ was God’s servant in the greatest piece of service there ever was, a chosen and the choice servant who did and suffered all by commission from the Father. In this we may see the sweet love of God to us, in the way he counts the work of our salvation by Christ his greatest service, and in that he will put his only beloved Son to that service. He might well prefix it with “Behold” to raise up our thoughts to the highest pitch of attention and admiration. In time of temptation, apprehensive consciences look so much to the present trouble they are in that they need to be roused up to behold him in whom they may find rest for their distressed souls.
In temptations it is safest to behold nothing but Christ the true brazen serpent, the true “Lamb of God who takes away the sin of the world”, (John 1:29). This saving object[Christ] has a special influence of comfort to the soul, especially if we look not only on Christ, but also upon the Father’s authority and love in him. For in all that Christ did and suffered as Mediator, we must see God in him reconciling the world to himself (2nd Cor. 5:19).
What a support to our faith is this, that God the Father, the One offended by our sins, is so well pleased with the work of redemption! And what a comfort is this, that, seeing God’s love rests on Christ, as well pleased in him, we may gather that he is as well pleased with us, if we be in Christ! His love rests in a whole Christ, in Christ mystical, as well as Christ natural, because he loves him and us with one love. Let us, embrace Christ, and in him God’s love, and build our faith safely on such a Savior who is given so high a commission.
See here, for our comfort, a sweet agreement of all three persons: The Father gives a commission to Christ; the Spirit gives to and adds holiness to it, and Christ himself executes the office of a mediator. Our redemption is founded on the joint agreement of all three persons of the Trinity.
[language slightly modernized in places by this site]