God has created you as an infinite, immortal soul, who is perfectly complete and lacking nothing.
There is nothing that you need to add to yourself to improve yourself or to make yourself in any way better than God created.
You are lacking nothing at all. You are perfect.
God created you as a beautiful soul filled with love and joy and perfectly creative. Fully equipped to exist in Heaven and to extend love forever. You need nothing else.
When Jesus says "There is nothing about me that you cannot attain. I have nothing that does not come from God. The difference between us now is that I have nothing else." he is talking about the fact that He is simply being ONLY the Self that God created. He has not added anything or taken anything away. He is being his normal, natural God-created self.
This perfect self is hiding underneath every idea of imperfection, lack, separation, limitation and death. God already has created you with perfection, to be perfect, forever. You are flawless.
And since you are created from creativity and from love, you are endowed with creativity and love. You are permanently miraculous. There is nothing that you cannot create with the power of the mind, in accordance with God's will, to increase the Kingdom.
Somewhere inside you, you know this. There is a place in which your soul is already within you, perfectly holy, undefiled, unchanged, unaffected, perfectly sane, happy and at peace. It's already there. God creates only permanent creations which cannot change.
Your soul is divine, forever. "Spirit is in a state of grace forever."