But one thing is needed
 																														  He who hates with his heart his sins and  enlightened by the Grace of the Holy Spirit desires now to serve our  common King, the first thing he must do is this. To think carefully and  understand that this new situation and study, which he wants to  undertake, is the most valuable work, the most wonderful wisdom, the  greatest and most beneficial good of all that exists in the world. And  to put it better, there is no other good or any other work that is  really true, and this is exactly what the Lord meant when He said to  Martha: “but one thing is needed (Luke 10:42)”.
  From the book Salvation of the Sinners by Monk Agapios Landos of the 17th century