‘And he sighed deeply.’ He was grieved, the Greek says; ‘sighed’ is the suggestion of our translators and it is reasonable.
Take care, if you haven’t come to Christ, or you don’t receive his word and recognise your need of the gospel and forgiveness. You are an unbeliever. Do you just go running from one refuge of unbelief to another? Do you say, ‘Yes, you have explained that question that I’ve put before you, but now I have got something else, and then something further’? Are you wilfully unbelieving, never being honest in these things or accepting any solution to any intellectual doubt you may have? The time will come when the Lord moves away from you. He will say, ‘No sign. Nothing more will be given to this person’, and when he departs your heart will never be stirred, and you will be from that time on under judgment. Unbelief is an insulting thing to God. You can see it here in its hideousness: how they rejected everything that he gave them.
You can’t have a sign of your choosing. ‘Oh, if God were to do this for me, then I’d believe. If God were to do that for me, then I would believe.’ You are a sinner in need of his pardon and forgiveness, in need of eternal life! You have his word, you have this word of God to teach you about the way of salvation. You can’t make conditions like that with God. Signs anyway were not meant to bring about faith. Yes, they were indications that he was the Son of God but they were given mainly as demonstrations of how he forgives and saves. They are teaching vehicles.