Christianity taught the capacity, the element, to love the All-perfect without a stingy bargain for personal happiness. It taught that to love Him was happiness;--to love Him in others' virtues.
How can we say nobody's perfect if there is no perfect to compare to? Perfection implies that there really is a right and wrong way to be. And what type of perfection is the best type? Moral perfection? Aesthetic? Physiological? Mental?