God deals with us in different ways and in various ways when it comes to grace. David was a shepherd boy tending his father's sheep when God took him from the pasture and appointed him king over Israel. This is grace, from tending flock to a king (2 Samuel 7:8 NIV). Saul, the persecutor, was a real threat to the early church when the Lord stopped him on the road to Damascus and made him an apostle and a great evangelist. What a transformation! Grace found him and was commissioned from heaven.
God calls unqualified people and qualifies them for His service and for His glory. Man's sin disqualifies him from being used as a vessel for God, but God's grace overrides all that disqualifies you and elevates you to a height where you cannot reach on your own. There is a divine call to come to God's holy presence, the throne of grace, for mercy and grace for our daily walk. I am personally pleading with you to embrace God's free grace, and you will experience all the goodness of God, and your life will never be the same.