If you are a Christian, you have already been called into the mission field. Whether you go into other countries, other cities, or within your family; all of these things are necessary to bring glory to God. In Matthew 28: 19-20 it says:
19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age.
You are called to go and tell (see Matthew 28:19-20), correct? As it says in Romans 10:13-14:
13 for, “Everyone who calls on the name of the Lord will be saved.” 14 How, then, can they call on the one they have not believed in? And how can they believe in the one of whom they have not heard? And how can they hear without someone preaching to them?
If we obey Jesus Christ, the command in the Great Commission, we will go to others nearby and far away. Because how can they know they need to call upon Jesus for salvation if we do not tell them? They cannot be saved if they do not know they are doomed. Therefore, we should go about our daily lives proclaiming the name of Jesus Christ.
In John 1:36-39 it says:
36 When he saw Jesus passing by, he said, “Look, the Lamb of God!”
37 When the two disciples heard him say this, they followed Jesus. 38 Turning around, Jesus saw them following and asked,“What do you want?”
They said, “Rabbi” (which means “Teacher”), “where are you staying?”
39 “Come,” he replied, “and you will see.”
So they went and saw where he was staying, and they spent that day with him. It was about four in the afternoon.
They asked where He was staying. They wanted to be with Him. In verse 39 He replies, “Come and you will see.” He will never reject those who sincerely want to be with Him. Just as John did, point people to Jesus.
In John 1: 40-42 it says:
40 Andrew, Simon Peter’s brother, was one of the two who heard what John had said and who had followed Jesus. 41 The first thing Andrew did was to find his brother Simon and tell him, “We have found the Messiah” (that is, the Christ). 42 And he brought him to Jesus. Jesus looked at him and said, “You are Simon son of John. You will be called Cephas” (which, when translated, is Peter).
We need to bring people to Jesus, just as Andrew did. When you bring someone to Jesus, their eternity is decided. Whether they decide to follow Him and go to heaven, or reject Him and go to hell, their eternity is decided when they hear the story of the one true way to heaven. Regardless of your past, God would love to use you, just as He loves to use people who desire to serve Him and carry out His Will. Jesus asks that we trade our sin and our dead lifestyle, for His perfection and His eternal life.
Jesus will never ask you to do something He has not perfected (see the temptation of Jesus in Matthew 4: 1-11). He also went and preached, as He tells us to do. As it says in Philippians 4:13, “I can do all things through Christ Who strengthens me.” We will never be tempted by anything we cannot overcome, and if we use the strength and might of Jesus Christ, we can overcome anything.
Jesus is the one and only way to obtain salvation (see John 14:6), that is why we must point and bring people to Him.