The Lord used Peter to do wonderful things, changing the world forever, not just then, but even to our day! Yet, Peter’s brother found Jesus first, and then told Peter about the discovery,

One of the two who heard John speak, and followed Him, was Andrew, Simon Peter’s brother. He first found his own brother Simon, and said to him, “We have found the Messiah” (which is translated, the Christ). And he brought him to Jesus. Now when Jesus looked at him, He said, “You are Simon the son of Jonah. You shall be called Cephas” (which is translated, A Stone) (John 1:40–42).

Did Andrew have any idea, even the slightest, of what his brother would do for the world? Likewise, we never know what will happen when we bring people to Jesus Christ.