Pastor Gerrit teaches through Luke 11:29-36, on why Jesus refused to give the crowd another sign. Instead of more proof, he points them to the sign of Jonah, his own death and resurrection, and exposes the deeper problem: hearts that stay closed even with every reason to believe. Using the Queen of Sheba, the people of Nineveh, and the image of a lamp and a healthy eye, Jesus shows that spiritual blindness isn't about missing evidence but an unwillingness to see. Light, he says, is meant to be received, not earned, filling completely whoever lets it in.