Paul looked at his career as one from the Lord Jesus to be "telling others the gospel of the wonderful grace of God."
I think if I do not tell my family and friends of the grace of God my life will not amount to much.
"Always be humble and gentle. Be patient with each other, making allowance for each other’s faults because of your love. Make every effort to keep yourselves united in the Spirit, binding yourselves together with peace. For there is one body and one Spirit, just as you have been called to one glorious hope for the future. There is one Lord, one faith, one baptism, one God and Father of all, who is over all, in all, and living through all. He has given each one of us grace through the generosity of Christ." (Ephesians 4:2-7)