Permeated by the thought of God (Theophan the Recluse)

   Into every duty a God-fearing heart must be put, a heart constantly permeated by the thought of God; and this will be the door through which the soul will enter into active life...  The essence is to be established in the remembrance of God, and to walk in his presence. 

 --Theophan the Recluse,
19th-century Russian starets 

Image source: https://www.ibelieve.com/faith/what-does-god-is-love-mean-in-1-john-48.html Quotation source