Matthew 4:18 While walking by the Sea of Galilee, he saw two brothers, Simon (who is called Peter) and Andrew his brother, casting a net into the sea, for they were fishermen. And he said to them, “Follow me, and I will make you fishers of men.” Immediately they left their nets and followed him. And going on from there he saw two other brothers, James the son of Zebedee and John his brother, in the boat with Zebedee their father, mending their nets, and he called them. Immediately they left the boat and their father and followed him.
Mark 10:28-31 Peter began to say to him, “See, we have left everything and followed you.” Jesus said, “Truly, I say to you, there is no one who has left house or brothers or sisters or mother or father or children or lands, for my sake and for the gospel, who will not receive a hundredfold now in this time, houses and brothers and sisters and mothers and children and lands, with persecutions, and in the age to come eternal life. But many who are first will be last, and the last first.”
Luke 14:33 So therefore, any one of you who does not renounce all that he has cannot be my disciple.
God usually calls people as they are busy doing something. Jesus called the apostles as they were casting a net into the sea or mending their nets. “They were busy in a lawful occupation when he called them to be ministers: our Lord does not call idlers but fishers.” (Spurgeon) Look at men of God; Saul was looking for his father’s donkeys, David was keeping his father’s sheep, The shepherds were guarding their flocks, Amos was farming in Tekoa, Matthew was working at the tax collector’s table, Moses was tending his father-in-law’s flock, Gideon was threshing wheat, Abraham was a very busy man with large herds and flocks, Luke was a physician, Paul was a high ranking official. All of these men heard the calling of God and responded to that calling with obedience. Therein is the difference between those that hear and obey and those that hear and don’t. It does not matter when or where you hear God’s calling of you to repentance and faith in Jesus Christ. It does matter what you do after you hear Him calling. People deny hearing it, deafen their ears to hear it, neglect it, cast it aside as foolishness, delay acting upon it, and a host of other “not nows”. The day of salvation is now. Hebrews 3:7 Therefore, as the Holy Spirit says: “Today, if you hear His voice, do not harden your hearts.