Heb. 9:28. To bear the sins of many,
As at the Liturgy we bring up sins and say: voluntarily and involuntarily we have sinned, forgive — that is, we first recall our sins, and then ask for forgiveness — so He Himself also said to the Father: "for their sakes I sanctify Myself" (John 17:19). Or: He bore the sins, that is, He took them away from the people and brought them to the Father, so that He might remit them. Why then did He say "of many" and not of all? Because not all believed. His death was sufficient for the perdition of all, and insofar as it depended on Him, He died for all. But He did not bear the sins of all, because they themselves did not desire it. Therefore they made the death of the Son of God useless for themselves, which is truly a matter of horror. So explains Saint John Chrysostom. I found in his writings, on the following passage in the Gospel: "and to give His life as a ransom for many" (Matt. 20:28), a note explaining this expression: "'many' is used instead of 'all,' for 'all' are indeed 'many.'"
Heb. 9:28. He will appear a second time, not for the cleansing of sin, but for those who await Him unto salvation.
He died, he says, having taken up our sins and brought them to the Father, so that He might blot them out, for which reason He also died. For to Him Who knew no sin, the Father imputed sin, since He, Christ, took upon Himself our nature. "He will appear a second time," no longer bearing sins upon Himself and having no need of a second death on account of them, but as Judge "for those who await Him for salvation," that is, for those who believe in Him and await His coming: evidently, also for those who live worthily of salvation. Of course, He will come not only for salvation, but also for the punishment of unbelievers and sinners, but the apostle spoke only of the joyful part.