Simply quotes of the Eastern Orthodox Christian Church fathers, saints, elders, hymns, prayers, and services.
St. John of Kronstadt: Do not cling with your heart to anything . . .
“Do not cling with your heart to anything, and do not make it the god of your heart; the sole God of our heart must be the Lord-God, Who created it: for our heart is His breath.
Do not cleave with your whole heart unto any person, that is to any flesh, for the sole God of our heart must be the Lord-God, and to Him only must we cleave. For attachment to material things, or to flesh, is a lie, an enticement of Satan and the will of the Devil. Amen.”