I think people generally lost their sense of wonder. The most probable reason is our culture’s individualism. Not that it never existed in history but it is so magnified and embraced today that the heart of this generation thinks that nothing is greater and more valuable than itself. Even Christians, who have to be creatures that always wonder (at least more than the unbelievers) by necessary implication of knowing and witnessing God through the gospel, are clearly under the chains of individualism. It pushes away God to a role of the great helper to our causes and makes us become self-centered rather than God-centered.
But how come we see this but don’t repent? Why doesn’t the church call us to repent? because that’s what we need. But we don’t do it. The church doesn’t do it. We have to stop being self-centered and people-centered. We need to return to God and behold His glory. We need a deeper understanding of the gospel that will end the vain act of chasing after ourselves. Then our hearts and eyes will wonder and delight in the most seemingly ordinary encounters to the grandest vision of Christ.