The doctrine of grace is singular, profound, and an essential element of the gospel. A simple definition of grace is "unmerited favor" (favor inmerecido). Strong's gives this semantic range:
χάρις (a) grace, as a gift or blessing brought to man by Jesus Christ (b) favor (c) gratitude, thanks (d) a favor, kindness.
Defining grace, though, is a bit like dissecting a frog. It loses life in the process. Let's look at grace in context. Here's an example of grace that surfaced after a recent tragedy in the U.S.
When we read Romans 5:8 with this video in view, the weight of what Paul declares becomes evident. As powerful as this video is, it pales in comparison to the forgiveness (and pardon!) that we receive through Jesus' death. Let's remember that in this analogy we aren't the ones forgiving, we're in a jumpsuit restrained by shackles.