Hebrews 4:16—“Let us therefore come forward with boldness to the throne of grace that we may receive mercy and find grace for timely help.”
Note 2 on mercy says: “Both God’s mercy and God’s grace are the expression of His love. When we are in a pitiful condition, first God’s mercy reaches us and brings us into a situation in which He is able to favor us with His grace. Luke 15:20-24 tells us that when the father saw the prodigal son returning, he had compassion on him. That was mercy, which expressed the father’s love. Then the father clothed him with the best robe and fed him with the fattened calf. That was grace, which again manifested the father’s love. God’s mercy reaches farther and bridges the gap between us and God’s grace.