The “desert fathers” were medieval monks who chose to live in solitude. Someone asked one of them why he made such a drastic choice. He poured water and some sand into a jar, then shook it. The water became clouded and murky. As he allowed the jar to rest, the sand settled to the bottom and the water became clear again.
Translation? Give some time to separate yourself from the rest of the world and meditate on pure. It’ll give you perspective on what has made your cup murky.
“Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable–if anything is excellent or praiseworthy–think about such things.” (Philippians 4:8 NIV)