'Faithful' in the Bible

Therefore, it was essential that He had to be made like His brothers (mankind) in every respect, so that He might [by experience] become a merciful and faithful High Priest in things related to God, to make atonement (propitiation) for the people’s sins [thereby wiping away the sin, satisfying divine justice, and providing a way of reconciliation between God and mankind].

He was faithful to Him who appointed Him [Apostle and High Priest], as Moses also was faithful in all God’s house.

Now Moses was faithful in [the administration of] all God’s house, [but only] as a ministering servant, [his ministry serving] as a testimony of the things which were to be spoken afterward [the revelation to come in Christ];

but Christ is faithful as a Son over His [Father’s] house. And we are His house if we hold fast our confidence and sense of triumph in our hope [in Christ].

Let us seize and hold tightly the confession of our hope without wavering, for He who promised is reliable and trustworthy and faithful [to His word];