Summary: God’s Son, our Lord Jesus, is the firm foundation, the solid Rock, upon which our faith is built.
TWO ASSURANCES AND ONE COMMAND
Nevertheless the foundation of God stands sure, having this seal: "The Lord knows those who are His," and, "Let everyone who names the name of Christ depart from iniquity."
Paul warns Timothy of false teachings that were common in the early history of the church. He pointed out the false teachings of Hymenaeus and Philetus who taught that the resurrection of the dead had already occurred. This is the background for verse 19.
NEVERTHELESS, THE FOUNDATION OF GOD STAND SURE
After instructing Timothy to avoid the vain babblings and errant teachings that were hindering the early church, Paul says that, in spite of all this, the foundation of God stands firm. False doctrines will not shake the foundation of God. God’s Son, our Lord Jesus, is the firm foundation, the solid Rock, upon which our faith is built.
Samuel J. Stone penned these lines that beautifully convey this truth. His poem, set to music by Samuel S. Wesley, comprise one of the truly great hymns of the Church.
“The church’s one foundation
Is Jesus Christ her Lord;
She is His new creation,
By Spirit and the Word:
From heaven He came and sought her
To be His holy bride,
With His own blood He bought her,
And for her life He died.”
HAVING THIS SEAL: THE LORD KNOWS THOSE WHO ARE HIS.
This provides great strength and enormous comfort to us. We do not have to introduce ourselves to God at any point in our relationship. He knew us before the foundation of the world and He knows us now. Several wonderful Scriptures justify our confidence. Consider:
“Just as He [the Father] chose us in Him [the Son] before the foundation of the world, that we should be holy and without blame before Him in love, having predestined us to adoption as sons by Jesus Christ to Himself, according to the good pleasure of His will.” Ephesians 1:4-5 (quickview)
Living a righteous, holy and separated life is a command that we can and must obey if we are to be pleasing unto God. Paul clearly states this. "Come out from among them and be separate, says the Lord. Do not touch what is unclean, and I will receive you." (2 Corinthians 6:17 (quickview) )
“For the good that I will to do, I do not do; but the evil I will not to do, that I practice. Now if I do what I will not to do, it is no longer I who do it, but sin that dwells in me. I find then a law, that evil is present with me, the one who wills to do good. For I delight in the law of God according to the inward man. But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. O wretched man that I am! Who will deliver me from this body of death? I thank God--through Jesus Christ our Lord!”