This question is at the heart of the final part of the Easter festival.
Ascension Day is 40 days after Easter; having appeared to the disciples for those 40 days, causing joy, confusion and surprise, Jesus returns to the heavens, following some final words of encouragement.
Jesus promises to be with us always, and that he will send a comforter, the Spirit of Truth, as the everlasting presence of God.
10 days later, on the feast of Pentecost (literally, 50 days), the Holy Spirit of God, with the sound of a rushing wind, and with tongues of flame, descends. This Spirit gives the leaders of the Church the ability to speak many languages, and the energy, strength and comfort to tell all people of God’s love, to grow the Church and to teach in Jesus’ name. The Spirit, sent in Jesus’ name by God the Father, is with us always.
We considered these two events in Chapel services for all students. In Primary, I used a helium-filled balloon with a very long ribbon, to demonstrate the Ascension. Students were invited to consider ways in which Jesus, having gone away, can also be with us always: when we pray, read the scriptures, receive a blessing and celebrate sacraments (Baptism and Holy Communion), Jesus is ‘pulled down’ to be by our side, and alive in us, through the same Holy Spirit that came at Pentecost. We used the ribbon to pull the balloon down, showing that through our faith and actions, Jesus is with us always, and we can bring him close to us.