求翻译：当我们还是孩子的时候，我们总是可以没有为什么就单纯的去相信世界是美好的，一切是简单的，就想动画片里的好人与换人那么明确，没有复杂的存在？是什么意思？

When we were kids, when why can not we always simple to believe the world is wonderful, everything is simple, is trying to good cartoons and changed so clearly, there are no complex?