Acts 22:14 & 15

"'Then he said: "The God of our fathers has chosen you to know his will and to see the Righteous One and to hear the words from his mouth. You will be his witness to all men of what you have seen and heard."'" NIV translation

Now Ananias is used by God to tell Saul/Paul his purpose and that is to be a witness for Jesus. We may say that this was just for Paul but we, too, have been given the same purpose. Though we may not have seen and heard Jesus on the road like he did, if you know Jesus and what He has done for you, you are to testify to "what you have seen and heard". 

Acts 22:16

"'And now what are you waiting for? Get up, be baptized and wash your sins away, calling on his name.'" NIV translation

Ananias gave Paul his final instructions which were to go and get prepared to serve. Baptism has been twisted and used to divide God's people into different groups. The simple fact of the matter is that Jesus was baptized by John in the Jordan River (see Matthew 3:13-17). This happened before Jesus began His earthly ministry as a man. We, like Paul, are called to be His disciples and that means doing the same things that Jesus did. It was what Paul was told to do here before the start of his service and it is what we are to do as well.

Acts 22:17 & 18

"'When I returned to Jerusalem and was praying at the temple, I fell into a trance and saw the Lord speaking. "Quick!" he said to me. "Leave Jerusalem immediately, because they will not accept your testimony about me."'" NIV translation

Paul tells us now of a vision and of the instructions that Jesus gave him concerning his work. The Lord knows all and knew that they would not accept Paul's testimony in Jerusalem so He sent Paul elsewhere. This example can strengthen us when we have times where people do not want to accept our story of how God is working in our lives. There are even those that do not accept the fact that God will give His people visions today but, as we can see, God is in control and communicates with His children in many ways.