mercy: undeserved kindness toward someone in trouble, shown not as a mere feeling but as help actually given
Greek writers before the New Testament used this word for pity felt at someone's suffering, and they assumed the sufferer did not deserve the trouble. The New Testament keeps the word but turns that assumption inside out. The people who receive God's mercy here are not the innocent who fell on hard times; they are the guilty, the ones who have no claim on kindness at all. Mercy in this sense is God choosing to rescue people who have earned the opposite.
The word also carries the weight of the Old Testament idea of loyal, covenant-keeping love (חסד). When the Gospel writers and Paul reach for it, they are usually echoing the Greek Old Testament, where this same word stood for God's faithful kindness to Israel, the kindness he promised and keeps on showing across generations. So the word looks back to ancient promises and forward to their rescue in Christ.
The two senses below are one mercy seen from two sides. First and mainly it is God's mercy, the kindness that saves people who do not deserve it. From that flows the second: the mercy God's people owe one another, the practical kindness to those in need that Jesus calls the very heart of God's Law. The same word covers both because the second is meant to mirror the first.
Throughout, the stress falls on action rather than mood. Mercy here is something done:
- a debt forgiven
- a sick man healed
- a sinner saved
- a neighbor cared for.
It is kindness that costs the giver something and rescues the receiver.