Verse 17. Wherefore it behoved him - It was highly fit and proper, yea, necessary, in order to his design of redeeming them. To be made in all things - That essentially pertain to human nature, and in all sufferings and temptations. Like his brethren - This is a recapitulation of all that goes before: the sum of all that follows is added immediately. That he might be a merciful and faithful High Priest-Merciful toward sinners; faithful toward God. A priest or high priest is one who has a right of approaching God, and of bringing others to him. Faithful is treated of, chap. iii, 2, &c., with its use; merciful, chap. iv, 14, &c., with the use also; High Priest, chap. v, 4, &c., chap. vii, 1, &c. The use is added from chap. x, 19. In things pertaining to God, to expiate the sins of the people - Offering up their sacrifices and prayers to God; deriving God's grace, peace, and blessings upon them.
Verse 18. For in that he hath suffered being tempted himself he is able to succor them that are tempted - That is, he has given a manifest, demonstrative proof that he is able so to do.