Story #1. Let's assume that you don't know anything about astronomy and I tell you that the earth we live on is a round sphere and the sun is also a sphere but so much bigger that 960,000 balls each of the size of an earth can fit inside the sun, and that there are other planets even larger than the earth all orbiting around the sun, and that the solar system is just a tiny part of a galaxy containing billions of stars, and that there are billions of galaxies out there . . . this would be so mind-boggling that you probably wouldn't believe in anything I've said.
Story #2. I tell you about a man named Jesus who came to us about 2,000 years ago. He cured the sick, performed many other miracles, and was crucified so that we might be saved from condemnation. Then he was raised from the dead by God and ascended into heaven. You probably would believe in this story more readily than in the first.
Of course, the reverse is true today. What has happened? I think people believe in the first story now because that see the stars and have learned about the many scientific discoveries, while Jesus they do not visually see and his story is an old one. To the intelligent person, this shouldn't make any difference. But the main reason people do not readily accept Jesus, I believe, is that his challenging messages touch a nerve in all sinners, causing discomfort in them ~ not a good reason, but real.