Below is a photo of the note Saint Paisios would leave outside his door when he sick and unable to see his visitors, it reads…
“Write what you want, drop it in the indicated place on the box, and I will help you more with my Prayers, instead of my many words. This way, I will have time to help more people in pain. I came here for Prayer, and not to pretend to be a teacher.” – Monk Paisios
Read about the miraculous key of Saint Paisios: …he does the Sign of the Cross over the door and a click is heard and the door opens by itself.