"A brother told some elder: 'I do not see any battle in my heart.' 'You are a building open on all four sides', the elder said to him. 'Whoever wishes comes in and out through you and you are not aware of it. If you have a door and close it, refusing entry to wicked logismoi through it, then you will see them standing outside and doing battle.'"
Anonymous saying of the Desert Fathers no. 270 = N.57/11.101. The anonymous sayings of the Desert Fathers: a select edition and complete English translation, ed. & trans. John Wortley (Cambridge: Cambridge University Press, 2013), 183.