Desert Fathers

Another brother spoke with the same Theodore, and he began to talk about matters of which he had no experience. Theodore said to him, 'You've not yet found a ship to sail in, nor put your luggage aboard, nor put out to sea, and you're already acting as if you were in the city which you mean to reach. If you make some attempt to do the things you are discussing, then you can talk about them with understanding.'

The Desert Fathers, Sayings of the Early Christian Monks ↗