Evangelization and election
Since we have no choice when it comes to becoming a Christian, i.e, we cannot choose to say "yes" to the Gospel, nor can we choose to believe even after the Gospel is presented to us, and God does all the work in conversion, then why do we evangelize since God decides who He will convert?
Your question touches on the subject of predestination (Acts 13:48; Romans 8:28-30; 2 Thessalonians 2:13; 2 Timothy 1:9; 1 Peter 1:2). While God has revealed in the Bible that he has chosen his children from eternity, he has also revealed in the Bible that he brings the elect to faith through the gospel (John 3:5; Romans 10:17; Titus 3:5-7; 1 Peter 1:23; James 1:18). For that reason, Jesus instructed his followers to “Go into all the world and preach the good news to all creation” (Mark 16:15).
The confessions of our church summarize these points: “For through the Word and Sacraments, as through instruments, the Holy Ghost is given, who works faith, where and when it pleases God, in them that hear the Gospel, to wit, that God, not for our own merits, but for Christ’s sake, justifies those who believe that they are received into grace for Christ’s sake” (Augsburg Confession, Article V).
Armed with this information, we strive to share the gospel of Jesus Christ with all the world.