28. Christ--Greek, "THE Christ"; the representative MAN; representing all men, as the first Adam did.
      once offered--not "often," Heb 9:25; just as "men," of whom He is the representative Head, are appointed by God once to die. He did not need to die again and again for each individual, or each successive generation of men, for He represents all men of every age, and therefore needed to die but once for all, so as to exhaust the penalty of death incurred by all. He was offered by the Father, His own "eternal Spirit" (Heb 9:14) concurring; as Abraham spared not Isaac, but offered him, the son himself unresistingly submitting to the father's will (Ge 22:1-24).
      to bear the sins--referring to Isa 53:12, "He bare the sins of many," namely, on Himself; so "bear" means, Le 24:15; Nu 5:31; 14:34. The Greek is literally "to bear up" (1Pe 2:24). "Our sins were laid on Him. When, therefore, He was lifted up on the cross, He bare up our sins along with Him" [BENGEL].
      many--not opposed to all, but to few. He, the One, was offered for many; and that once for all (compare Mt 20:28).
      look for him--with waiting expectation even unto the end (so the Greek). It is translated "wait for" in Ro 8:19, 23; 1Co 1:7, which see.
      appear--rather, as Greek, "be seen." No longer in the alien "form of a servant," but in His own proper glory.
      without sin--apart from, separate from, sin. Not bearing the sin of many on Him as at His first coming (even then there was no sin in Him). That sin has been at His first coming once for all taken away, so as to need no repetition of His sin offering of Himself (Heb 9:26). At His second coming He shall have no more to do with sin.
      unto salvation--to bring in completed salvation; redeeming then the body which is as yet subject to the bondage of corruption. Hence, in Php 3:20 he says, "we look for THE SAVIOUR." Note, Christ's prophetical office, as the divine Teacher, was especially exercised during His earthly ministry; His priestly is now from His first to His second coming; His kingly office shall be fully manifested at, and after, His second coming.

JFB.