WNT(i)
12 Therefore, my dearly-loved friends, as I have always found you obedient, labour earnestly with fear and trembling--not merely as though I were present with you, but much more now since I am absent from you--labour earnestly, I say, to make sure of your own salvation.
13 For it is God Himself whose power creates within you the desire to do His gracious will and also brings about the accomplishment of the desire.