1 Timothy 4:10 (English Standard Version)
10For to this end we toil and strive, because we have our hope set on the living God, who is the Savior of all people, especially of those who believe.
Chrysostom (349-407) on Hebrews 9:28. "So
Christ was once offered.": By whom offered? evidently by Himself. Here
he says that He is not Priest only, but Victim also, and what is
sacrificed. On this account are [the words] "was offered." "Was once
offered" (he says) "to bear the sins of many." Why "of many," and not
"of all"? Because not all believed, For He died indeed for all, that is
His part: for that death was a counterbalance against the destruction
of all men. But He did not bear the sins of all men, because they were
not willing. NPNF1: Vol. XIV, Epistle to the Hebrews, Homly 17.
This is not a contradiction in terms, it is a proposition that fits into God's redemptive plan - that is:
1) Christ's death was of general benefit to all Mankind, in that the guarantee of His sacrifice was the source of our just God extending grace to Adam and not immediately and utterly destroying Man at the Fall or allowing Man, in his own total depravity and slavery to sin, destroy himself- thus Unlimited in application in that sense. "who is the Savior of all people"
2) Christ's death was of specific benefit to the Elect, in whom He, by His grace, has given the gift of faith through the Holy Spirit, resulting in true spiritual and saving belief in Christ. "especially of those who believe"