* During the 40 days after Jesus' resurrection, (being raised from the dead), he appeared
    to his disciples from time to time.  He spoke to them about the kingdom of God.

 * Once he told them to stay in Jerusalem and wait for the gift he would send them.
    That gift would be the Holy Spirit. He would live in them and guide them.  He
    would be a Comforter to them.  Jesus wanted them to tell everyone on earth that he
    had died for them.  He told them to teach and to baptize those who believed.

 * After Jesus said this, he was taken up to heaven right in front of their eyes.  A cloud
    hid him from their sight and two angels, who looked like men dressed in white,
    came and stood beside them.

 * The angels said, "Why are you looking up in the sky?  This same Jesus who has been
    taken up into heaven will come back some day in the same way you have seen him
    go into heaven."

 * We also believe that he will come again.

  The story of the Ascension can be found in Luke 24:50-53, and also in Acts 1:1-11.
 

And he said unto them, Go ye into all the world, and preach the gospel to every creature.
He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
So then after the Lord had spoken unto them, he was received up into heaven,
and sat on the right hand of God.

                            Mark 16:15-16, and 19