43 The official teachings of the Catholic faith, in complete agreement with Scripture, assure us that the only begotten Son of God took a human nature capable of suffering and death especially because He desired, as He hung from the Cross, to offer a bloody sacrifice in order to complete the work of man's salvation. This the Apostle of the Gentiles teaches in another way: "For both He that sanctifieth, and they who are sanctified are all of one. For which cause He is not ashamed to call them brethren, saying, 'I will declare thy name to My brethren'. . .And again, 'Behold I and My children, whom God hath given Me.' Therefore, because the children are partakers of flesh and blood, He also in like manner hath been partaker of the same. . .Wherefore it behooved Him in all things to be made like unto His brethren that He might become a merciful and faithful high priest before God, that He might be a propitiation for the sins of the people. For in that wherein He Himself hath suffered and been tempted He is able to succor them who are tempted."(42)
Source: Haurietis Aquas (Vatican.va)