29 And while the crowds were thickly gathered together, He began to say, “This is an evil generation. It seeks a sign, and no sign will be given to it except the sign of Jonah the prophet. 30 For as Jonah became a sign to the Ninevites, so also the Son of Man will be to this generation (Luke 11:29–30, NKJV).
The society in which Jesus lived and worked was evil. Oh, there were exceptions, to be sure. But, many people crowded around Jesus to see wonders but not to be convinced to believe and follow Him. Some followed Him around looking for personal advantages (John 6:26). Their constant clamoring for signs from Jesus showed their unwillingness to believe and follow Him (John 10:24-26). But, God attested His approval of Jesus “by miracles, wonders, and signs which God did through Him” (Acts 2:22; John 5:36). The “sign of Jonah” was yet to occur. His resurrection from the dead would declare His Sonship to the world (Rom. 1:4). Jonah’s three days and night in the great fish illustrated what would happen to Jesus. He would die, be buried, and arise from the dead on the third day (Matt. 12:40). The sign of Jonah’s “resurrection” convinced the Ninevites his message was from God, they repented, and God spared the city from destruction (Jonah 3:1-10). The resurrection of Jesus convinced many to repent toward God, turn from evil, and follow Him (Acts 2:41; 4:4; 10:40-43). It still does. We have a competent, inspired record of His signs and resurrection to convince us to hear, believe, and follow Jesus (John 20:30-31). Don’t seek new miracles to convince you to follow Jesus. His signs have happened. They are recorded in the Scriptures for the world to know, believe, and follow Jesus, the Son of God.