Read Isaiah 62.

God’s eternal faithfulness to Israel is proof of His steadfast love.  He keeps His covenants even in the face of unbelief.

God is not defined by my standards, but by His character, and His character is faithful and true Revelation 19:11.  Nothing that mankind can do threatens Who He is or the fulfillment of His purposes.

This is why Paul could say with confidence –  “For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come, nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.” Romans 9:38-39

All Your words are faithful and true.
Every hope I have is in You.
I will set my heart on Your perfect plan.
All Your words are faithful and true.

Hebrews 10:23 Let us hold fast the profession of our faith without wavering; (for he is faithful that promised;)