How do we know the doctrine of mercy is true?

The truth of the doctrine of mercy is rooted in the very nature of God, who declares that He will have mercy on whom He wills (Exodus 33:19). This truth is confirmed through various scriptures, such as Romans 5:8, which states, 'But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.' Here we see that God’s mercy is not based on our actions or worthiness but is a sovereign act of His grace. Hence, believers are encouraged to reflect this mercy by loving and doing good even to those who may be considered enemies.