Jamieson, Fausset and Brown on 1 Thessalonians 1:10

10. This verse distinguishes them from the Jews, as 1Th 1:9 from the idolatrous Gentiles. To wait for the Lord's coming is a sure characteristic of a true believer, and was prominent amidst the graces of the Thessalonians (1Co 1:7, 8). His coming is seldom called his return (Joh 14:3); because the two advents are regarded as different phases of the same coming; and the second coming shall have features altogether new connected with it, so that it will not be a mere repetition of the first, or a mere coming back again.

his Son ... raised from the dead--the grand proof of His divine Sonship (Ro 1:4).

delivered--rather as Greek, "who delivereth us." Christ has once for all redeemed us; He is our Deliverer ALWAYS.

wrath to come--(1Th 5:9; Col 3:6).