What is your one and only enemy?

Be ye perfect is the new commandment, the new religion.

Aim high―you cannot aim too high―every round you make in climbing the ladder of understanding leads you to a higher standard of perfection—perfection, according to your understanding now, perfection, according to your greater understanding as you grow into the greater light. 

There are no limitations to the doctrine of perfect love. Perfect love casteth out fear, and fear is your one and only enemy.