God is faithful to Jews (Deuteronomy 31:8)
"The LORD is the one who goes ahead of you; He will be with you. He will not fail you or forsake you. Do not fear or be dismayed."
Jews are unfaithful to God (Deuteronomy 31:26-27)
"For I know your rebellion and your stubbornness; behold, while I am still alive with you today, you have been rebellious against the LORD; how much more, then, after my death?"
God is faithful to Christians (2 Timothy 2:13)
"If we are faithless, He remains faithful, for He cannot deny Himself."
Christians are unfaithful to God (Matthew 26:33)
But Peter said to Him, "Even though all may fall away because of You, I will never fall away."
Christianity is unfaithful to God (Acts 20:29-30)
"I know that after my departure savage wolves will come in among you, not sparing the flock; and from among your own selves men will arise, speaking perverse things, to draw away the disciples after them.
In every period of history God is faithful! In every period of history God's children are unfaithful. I don't know about you, but I throw myself at the feet of Jesus and thank God for saving an unfaithful sinner. I also beg the Lord that somehow I could be used by God to magnify His faithfulness.
Aren't you glad you read the book of Deuteronomy?
For me to live is Christ.