{3} For our gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in {b} much assurance; as ye know what manner of men we were among you for your sake.

(3) Another reason why they ought in no way start back but continue to the end, because they cannot doubt this doctrine which has been so many ways confirmed to them, even from heaven, as they themselves well knew.

(b) Paul shows by two things that there followed very great fruit from his preaching, that is, by these gifts of the Holy Spirit, and that certain assurance which was thoroughly settled in their minds, as appeared by their willingly bearing the cross.

People's New Testament

1:5 For our gospel came not unto you in word only. God gave the spoken word power, the power of the Holy Spirit which dictated it.

But also in power. Observe that the power is referred to the preachers.

Ye know what manner of men we were among you for your sake. Ye know what was the life, the earnestness and the power of the Holy Spirit of us while we were preaching among you.

Wesley's Notes

1:5 With power - Piercing the very heart with a sense of sin and deeply convincing you of your want of a Saviour from guilt, misery, and eternal ruin. With the Holy Ghost - Bearing an outward testimony, by miracles, to the truth of what we preached, and you felt: also by his descent through laying on of hands. With much assurance - Literally, with full assurance, and much of it: the Spirit bearing witness by shedding the love of God abroad in your hearts, which is the highest testimony that can be given. And these signs, if not the miraculous gifts, always attend the preaching of the gospel, unless it be in vain: neither are the extraordinary operations of the Holy Ghost ever wholly withheld, where the gospel is preached with power, and men are alive to God. For your sake - Seeking your advantage, not our own.

Jamieson-Fausset-Brown Bible Commentary

5. our gospel-namely, the Gospel which we preached.

came-Greek, "was made," namely, by God, its Author and Sender. God's having made our preaching among you to be attended with such "power," is the proof that you are "elect of God" (1Th 1:4).

in power-in the efficacy of the Holy Spirit clothing us with power (see end of verse; Ac 1:8; 4:33; 6:5, 8) in preaching the Gospel, and making it in you the power of God unto salvation (Ro 1:16). As "power" produces faith; so "the Holy Ghost," love; and "much assurance" (Col 2:2, full persuasion), hope (Heb 6:11), resting on faith (Heb 10:22). So faith, love, and hope (1Th 1:3).

as ye know-answering to the "knowing," that is, as WE know (1Th 1:4) your character as the elect of God, so YE know ours as preachers.

for your sake-The purpose herein indicated is not so much that of the apostles, as that of God. "You know what God enabled us to be . how mighty in preaching the word . for your sakes . thereby proving that He had chosen (1Th 1:4) you for His own" [Alford]. I think, from 1Th 2:10-12, that, in "what manner of men we were among you," besides the power in preaching, there is included also Paul's and his fellow missionaries' whole conduct which confirmed their preaching; and in this sense, the "for your sake" will mean "in order to win you." This, though not the sole, yet would be a strong, motive to holy circumspection, namely, so as to win those without (Col 4:5; compare 1Co 9:19-23).

Matthew Henry's Concise Commentary

1:1-5 As all good comes from God, so no good can be hoped for by sinners, but from God in Christ. And the best good may be expected from God, as our Father, for the sake of Christ. We should pray, not only for ourselves, but for others also; remembering them without ceasing. Wherever there is a true faith, it will work; it will affect both the heart and life. Faith works by love; it shows itself in love to God, and love to our neighbour. And wherever there is a well-grounded hope of eternal life, this will appear by the exercise of patience; and it is a sign of sincerity, when in all we do, we seek to approve ourselves to God. By this we may know our election, if we not only speak of the things of God with out lips, but feel their power in our hearts, mortifying our lusts, weaning us from the world, and raising us up to heavenly things. Unless the Spirit of God comes with the word of God, it will be to us a dead letter. Thus they entertained it by the power of the Holy Ghost. They were fully convinced of the truth of it, so as not to be shaken in mind by objections and doubts; and they were willing to leave all for Christ, and to venture their souls and everlasting condition upon the truth of the gospel revelation.