The word 'perfect' is context-dependent. We use it all the time to describe things that aren't really perfect, or that we couldn't logically show to be perfect. I think the Bible uses perfection in the sense of having full control of our actions, under the assumption that being imperfect takes away some of this control, and the result is sin.
"Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts don't go away when scientists debate rival theories to explain them. Einstein's theory of gravitation replaced Newton's in this century, but apples didn't suspend themselves in midair, pending the outcome. And humans evolved from ape- like ancestors whether they did so by Darwin's proposed mechanism or by some other yet to be discovered."
-Stephen Jay Gould
-Stephen Jay Gould
