Matthew Henry Commentary 2 Thessalonians 2:13-15

"But we are bound to give thanks to God always for you, brethren beloved of the Lord, for that God chose you from the beginning unto salvation in sanctification of the Spirit and belief of the truth: whereunto he called you through our gospel, to the obtaining of the glory of our Lord Jesus Christ. So then, brethren, stand fast, and hold the traditions which ye were taught, whether by word, or by epistle of ours." — 2 Thessalonians 2:13-15 (ASV)

When we hear of the apostasy of many, it is a great comfort and joy that there is a remnant according to the election of grace, which perseveres and will persevere; especially we should rejoice if we have reason to hope that we are of that number. The preservation of the saints is because God loved them with an everlasting love, from the beginning of the world.

The end and the means must not be separated. Faith and holiness must be joined together as well as holiness and happiness. The outward call of God is by the gospel; and this is made effective by the inward working of the Spirit. The belief of the truth brings the sinner to rely on Christ, and so to love and obey him; it is sealed by the Holy Spirit upon his heart.

We have no certain proof of anything having been delivered by the apostles, more than what we find contained in the Holy Scriptures. Let us then stand firm in the doctrines taught by the apostles and reject all additions and vain traditions.