He's what we really need. If your friend is sick and dying, the most important thing he wants is not an explanation but for you to sit with him. He's terrified of being alone more then anything else. So God has not left us alone.
Our companionship with Him, like all true companionship, is a spiritual communion. All friendship, all love, human and Divine, is purely spiritual. It was after He was risen that He influenced even the disciples most.
How can modern men today make Christ, the absent Christ, their most constant companion still? The answer is that Friendship is a spiritual thing. It is independent of Matter, or Space, or Time. That which I love in my friend is not that which I see. What influences me in my friend is not his body but his spirit.