What are spiritual questions? They are questions from above. Most questions people ask of Jesus are questions from below, such as the question about which of a woman's seven husbands she will be married to in the resurrection. Jesus does not answer this question because it comes from a legalistic mind-set. It is a question from below.
Often Jesus responds by changing this question. In the case of the woman with seven husbands he says, "At the resurrection men and women do not marry - have you never read what God himself said to you: 'I am the God of Abraham, the God of Isaac and the God of Jacob?' He is God not of the dead but of the living" (Matthew 22:23-30).
We have to keep looking for the spiritual question if we want spiritual answers.