You know that on a serene night, when the lake is calm, its waters unrippled by a breath of wind, the sky is so well shadowed in it, with all the stars, that looking down, we see the beauty of the heavens there as well as if we raised our eyes on high. In like manner, when our soul is tranquil, unagitated by the winds of superfluous care, unevenness of disposition, or inconstancy of mind, it is well-suited to bear an image of Our Lord.
--St. Francis de Sales, Consoling Thoughts
