Remember Jesus Christ, risen from the dead, the offspring of David, as preached in my gospel, for which I am suffering, bound with chains as a criminal. But the word of God is not bound! Therefore I endure everything for the sake of the elect, that they also may obtain the salvation that is in Christ Jesus with eternal glory. The saying is trustworthy, for:
If we have died with him, we will also live with him;
if we endure, we will also reign with him;
if we deny him, he also will deny us;
if we are faithless, he remains faithful—
for he cannot deny himself. ~2 Timothy 2:8-13
Because you are in Christ and the Holy Spirit dwells within you, even though you are faithless many times, God is yet faithful to you. Because you are enjoined by the Holy Spirit in Christ, God remains faithful.
God cannot deny Himself
Because the Holy Spirit is the Seal of our Salvation (2 Corinthians 1:22), God will never leave us nor forsake us.
Because the Holy Spirit is the Spirit of Life Who is enjoined with us (Romans 8:2), God will not leave us as orphans.
God cannot deny Himself