After Philip baptized the eunuch he vanished. The eunuch’s faith wasn’t shaken. He didn’t doubt the great miracle of salvation that he had experienced because the man that led him to Christ was no where to be found. Instead the eunuch went on his way rejoicing. 
It’s easy to be discouraged when those that were influential in you serving the Lord move out of your life. But just because they leave doesn’t mean we are left without our God or without reason to rejoice. Let’s be thankful for the positive impact they had on our lives and continue to find our joy rooted in Jesus. 
Scripture taken from:

Acts 8:37-39