Excellence or Perfection!!!

I have often heard and read people say that strive for excellence not perfection... coz you cant achieve perfection. Trying to be perfect would make you feel miserable if you fail. However, I feel that although I am
not perfect, I still can try to be achieve perfection coz I love my work, I love when I train people, I love every aspect of my work, so its easy for me to achieve perfection. Poeple may still feel that I can do better, or I was not perfect, but I feel if you love your work, you can still achieve perfection.

I guess excellenec is an excuse of convenience we give ourselves...