There's an old joke that goes "I love the human race; it's people I can't stand." That's funny because there's so much truth in it. It's also a very sad reflection on the human heart.
Without question, people in the world are deceived and deceive themselves. But that often goes for Believers, too. Oh, yes, we can be very good at deceiving ourselves. For instance, Jesus makes it very clear that we are to love God with all our heart, soul, mind, and strength, and to love our neighbors as ourselves. As Believers, though, it's easy to become busy with "Christian activities" and convince ourselves that we love Him more than we really do.
Without question, people in the world are deceived and deceive themselves. But that often goes for Believers, too. Oh, yes, we can be very good at deceiving ourselves. For instance, Jesus makes it very clear that we are to love God with all our heart, soul, mind, and strength, and to love our neighbors as ourselves. As Believers, though, it's easy to become busy with "Christian activities" and convince ourselves that we love Him more than we really do.