Yes you can, it is a faith thing... do you think it is possible for God to make you perfect? then let it be done. do you wish to be imperfect, then you will be imperfect.
Jesus meant what he said when he commanded us to "be perfect"
Don't doubt, just believe you can be perfect from now on.
no man is perfect. man was / is made to be weak. now thats not an excuse, but dont deceive yourself to thinking you are perfect. if you think you are, you are lying to yourself. but what that scripture means is to aim to be perfect, in all that we do, its about being aware and conscious of ourselves and correcting ourselves. does that mean that we are perfect? no. no man is perfect.
as Gods children, we have to turn to Him to raise our awareness of ourselves. like me, once i was born again in the spirit, little things about myself and the world became clearer, much more than before. then when i got baptized, everything became even more magnified even more than before.
i like to compare being born again and getting baptized to getting engaged and getting married. not the same, but its a process. being born again in the spirit i compare to getting engaged, and getting baptized, is the wedding. where you give yourself to the Lord and become ONE with Him, much as you would with your spouse.
and that is when you become alive, and spiritually, thats when you became alive. \
im having a hard time finding my words tonight for some reason. maybe its because my daughter is whining next to me playing donkey kong because she cant beat a level. anyway...
its about the effort, patience, faith, love, and being humble. being humble is grossly over-looked for some reason, or so it seems.
with that said, nobody is perfect. we just aim for that with the help of God to make us aware of our flaws and strength and wisdom to correct them.