“You ought then to seek for a lamp to be lighted, that you may find pure thoughts. Those are the natural thoughts, which God made. People brought up at sea learn to swim, and when waves and billows rise, they are not surprised at it; but those who are not used to these things, when even a little sea comes up, take fright and go under. So it is with Christians. As the mind of a child of three cannot take in or understand the mind of a grownup reasoner, because there is a great difference of age between them, so Christians contemplate the world like infant children, with their eyes fixed upon the measure of grace. They are strangers to this age. Their city and their rest is elsewhere. Christians have the comfort of the Spirit, tears, and mourning, and sighing; and even the tears are an enjoyment to them. They have fear also, in the midst of joy and rejoicing, and thus are they like men carrying their blood in their hands, having no confidence in themselves, or thinking themselves to be anything, but despised and rejected above all men.”
- Saint Macarius the Egyptian
Reference: http://www.archive.org/details/fiftyspiritualho00pseuuoft