Hello @DesertWanderer, here are a few Scriptures that seem to speak directly to this.
Isaiah 43
10 "You are My witnesses,” declares the LORD,
“And My servant whom I have chosen,
In order that you may know and believe Me
And understand that I am He.
Before Me there was no God formed,
And there will be none after Me.
Matthew 28
19 "Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit,
20 teaching them to observe all that I commanded you; and lo, I am with you always, even to the end of the age."
Mark 16
15 Jesus said to them, “Go into all the world and preach the gospel to all creation."
Acts 1
8 "You will receive power when the Holy Spirit has come upon you; and you shall be My witnesses both in Jerusalem, and in all Judea and Samaria, and even to the remotest part of the earth.”
1 Peter 3
15 Sanctify Christ as Lord in your hearts, always being ready to make a defense to everyone who asks you to give an account for the hope that is in you, yet with gentleness and reverence.
It seems to me that we are the ones who are tasked with the various evangelistic efforts, including witnessing and apologetics. While we are clearly called to take part, we can never do so effectively apart from the power and the leading of the Holy Spirit, of course.
~Deut
p.s. - if we are not needed as His witnesses in this world .. Romans 10:17, what purpose do we serve (why wouldn't He take us home as soon as we've come to saving faith)