Psalms 2:1-12 (ESV)
Why do the nations rage and the peoples plot in vain? The kings of the earth set themselves, and the rulers take counsel together, against the Lord and against his anointed, saying, “Let us burst their bonds apart and cast away their cords from us.” He who sits in the heavens laughs; the Lord holds them in derision. Then he will speak to them in his wrath, and terrify them in his fury, saying, “As for me, I have set my King on Zion, my holy hill.” I will tell of the decree: The Lord said to me, “You are my Son; today I have begotten you. Ask of me, and I will make the nations your heritage, and the ends of the earth your possession. You shall break them with a rod of iron and dash them in pieces like a potter’s vessel.” Now therefore, O kings, be wise; be warned, O rulers of the earth. Serve the Lord with fear, and rejoice with trembling. Kiss the Son, lest he be angry, and you perish in the way, for his wrath is quickly kindled. Blessed are all who take refuge in him.
King David, even 1000 years before the coming of the Messiah, speaks not only of God’s support for his leadership, but of the day when the Messiah, King Jesus would come. We are told:
To welcome Jesus Christ and to submit to Him, v. 12. This is the great duty of the Christian religion; it is that which is required of all, even kings and judges, and it is our wisdom and interest to do it. Observe here, the command given to this purport: Kiss the Son. Christ is called the Son because so he was declared (v. 7), Thou art my Son. He is the Son of God by eternal generation, and, upon that account, he is to be adored by us. He is the Son of man (that is, the Mediator, John 5:27), and, upon that account, to be received and submitted to. He is called the Son, to include both, as God is often called emphatically the Father, because he is the Father of our Lord Jesus Christ, and in him our Father, and we must have an eye to him under both considerations. Our duty to Christ is here expressed figuratively: Kiss the Son, not with a betraying kiss, as Judas kissed him, and as all hypocrites, who pretend to honour him, but really affront him; but with a believing kiss.
—Matthew Henry’s Commentary
It is comfortable to look forward to Christmas, the coming of the baby Jesus in the manger, but He is a baby who would be and is the mighty King of the Universe, who will deal harshly with evil at His 2nd coming. Will we greet Him with a believing kiss or a betraying kiss?