“Night and day praying exceedingly that we might see your face, and might perfect that which is lacking in your faith?”
King James Version (KJV)
3:10 And perfect that which is wanting in your faith - So St. Paul did not know that they who are once upon the rock no longer need to be taught by man.
1Th 3:10 Night and day praying exceedingly. An expression of his intense longing to see again a band of young converts so tenderly endeared to him. And may perfect that which is lacking in your faith. Instruct them more fully in knowledge and duty. So recently heathen, they needed a wise teacher very much.