Perfect:

1. conforming absolutely to the description or definition of an ideal type: a perfect sphere; a perfect gentleman. 2. excellent or complete beyond practical or theoretical improvement: There is no perfect legal code. The proportions of this temple are almost perfect. 3. exactly fitting the need in a certain situation or for a certain purpose: a perfect actor to play Mr. Micawber; a perfect saw for cutting out keyholes. 4. entirely without any flaws, defects, or shortcomings: a perfect apple; the perfect crime.

 I was using perfect like in number 1-4. 
Angels aren't perfect.