‘And by reason hereof’ – by reason of his infirmity, and his own sinfulness – ‘he ought,’ – and the word ‘ought’ in the Greek is very strong: he is bound to – ‘as for the people, so also find himself, to offer for sins.’ Yes, he must make offerings for himself, because like the people he is a sinner.
There has only ever been one effective sacrifice provided by the Lord: the Lamb of God who takes away the sins of the world. All previous gifts and sacrifices pointed forward to Christ’s work, and in Old Testament times the Mosaic sacrifices were to be seen as an earnest of God’s provision in the future. We may draw hope from God’s ordinances, for he starts nothing that he does not finish, but we must distinguish between God’s earnest and his real provision and not lean too heavily on the former when only the latter is intended to bear our weight.
Were the people truly forgiven under the law by the Mosaic sacrifices? That depended on whether they exercised faith and whether they had understanding of what God was providing for them. Those who depended on the earthly sacrifice carried out by earthly priests in an earthly tabernacle received only external, ceremonial forgiveness under the law. They were accepted under the terms of the Mosaic covenant and did not break it, but that covenant did not itself offer salvation, their sin was not truly taken away, and they were not justified before God, for that has only ever been through the covenant of grace and by faith. On the other hand, those who saw in the Mosaic sacrifices a promise from God that he would provide a way for their sins to be removed, and who trusted him to do this; they were forgiven on the basis of Christ’s future sacrifice for sin, however sketchy their understanding.