God's mercy to the believer is revealed by His taking away the misery of sin's consequences through the New Covenant of our Lord Jesus Christ. Mercy is not something deserved or earned, but as the Paul says, "Not by works of righteousness which we have done, but according to HIS MERCY He saved us."
Our Heavenly Father is the author, originator, and source of all mercy.
Even when we were spiritually dead because of our sins, God's patience was working on our behalf. He was tolerant, patient and kind towards us. God has excessive good will, compassion, and desire to help us. His attitude was kind, compassionate, and forgiving in His treatment of us. He wanted to relive our distress and bring relief from our sins. He did this by giving us life in place of death. It was with Christ that this salvation was secured. By grace, kindness, and favor we are saved. All of this was the result of God's love where with He loved us, always seeking the welfare and betterment of us. God likes us.