God is holy. He is the only one who is worthy of our worship. He is the one that is perfect in everything. He is the only one who isn't going to make bad choices. Therefore, we are to continually strive to be holy as God is holy. This isn't easy. But, it should be our daily goal. We will never actually be holy here on earth. We will fail daily. But, along the path, we should become more holy, more like God. We may have some setbacks, but our overall course should be towards perfect.