Ask this question: Does the salvation of the world truly depend on the letter that you are writing, the copper you are cleaning, the sentence full of wisdom that you are in the midst of pronouncing? Did the world not exist for millions of years before you said or did this or that? Will it not still live millions of years without your continuing to be a useful presence? So give it a chance now to enjoy your absence. Settle peacefully and say: ‘Whatever happens, I will not budge.’ Say to all those, visible and invisible, who come to disturb you: ‘I am very sorry; I am here, but not for you! …’ This is what we are always doing: suppose we are in conversation with someone and another person knocks on the door, you answer: ‘I am sorry, I am busy.’ If you are busy with God, you do not say: ‘I am sorry, go away.’ What logic, what common sense is there in this? It is not even a matter of contemplation, it is a matter of being polite!
Metropolitan Anthony Bloom, God and Man, p. 106