It was an entirely new thought when Jesus spoke to His disciples of their Father in heaven. It was a thrilling novelty when Paul bade servile worshippers realise that they were no longer slaves, but sons, and as such, heirs of God. It was the rapture of pointing to a new star flaming out, as it were, that swelled in John's exclamation: 'Beloved, now are we the sons of God!' For even though in the Old Testament there are a few occasional references to Israel's King or to Israel itself as being 'God's son,' as far as I remember, there is only one reference in all the Old Testament to parental love towards each of us on the part of God, and that is the great saying in the 103rd Psalm: 'Like as a father pitieth his children, so the Lord pitieth them that fear Him.' For the most part the idea connected in the Old Testament with the Fatherhood of God is authority: 'If I be a Father, where is Mine honour?' says the last of the prophets. But when we pass into the New, on the very threshold, here we get the germ, in these words, of the blessed thought that, as His disciples, we, too, may claim sonship to God through Him, and penetrate beyond the awe of Divine Majesty into the love of our Father God. Brethren, notwithstanding all that was unique in the Sonship of Jesus Christ, He welcomes us to a place beside Himself, and if we are the children of God by faith in Him, then are we 'heirs of God, and joint heirs with Christ.' Now the second thought that I would suggest from these words is-- II. The sweet 'must' of filial duty. 'How is it that ye sought Me?' That means: 'Did you not know where I should be sure to be? What need was there to go up and down Jerusalem looking for Me? You might have known there was only one place where you would find Me. Wist ye not that I _must_ be about My Father's business?' Now, the last words of this question are in the Greek literally, as the margin of the Revised Version tells us, 'in the things of My Father'; and that idiomatic form of speech may either be taken to mean, as the Authorised Version does, 'about My Father's business,' or, with the Revised Version, 'in My Father's house.' The latter seems the rendering most relevant in this connection, where the folly of seeking is emphasised--the certainty of His place is more to the point than that of His occupation. But the locality carried the occupation with it, for why must He be in the Father's house but to be about the Father's business, 'to behold the beauty of the Lord and to inquire in His Temple'? Do people know where to find us? Is it unnecessary to go hunting for us? Is there a place where it is certain that we shall be? It was so with this child Jesus, and it should be so with all of us who profess to be His followers.