6 Therefore also the Psalmist, struck with astonishment at the equality of this distribution, exclaimed, “Night unto night shows knowledge.” If you know how to meditate wisely on these matters, you will admire the Being who fixed these immoveable boundaries even from the beginning. Let the avaricious hear these things; and those who are coveting the wealth of others; and let them imitate the equality of the day and night. Let those who are puffed up and high-minded also hear; and those who are unwilling to concede the first places to others!
The day gives place to the night, and does not invade the territory of others! But you, while always enjoying honour, can you not bear to share it with your brethren? Consider also with me the wisdom of the Lawgiver. In winter He has ordered that the night should be long; when the germs are tender, and require more coolness; and are unable to sustain the hotter rays of the sun; but when they are somewhat grown, the day again increases with them, and becomes then the longest, when the fruit has now attained ripeness.
And this is a beneficial arrangement not only for seeds, but for our bodies. For since during winter, the sailor, and the pilot, and the traveller, and the soldier, and the farmer, sit down for the most part at home, fettered by the frost; and the season is one of idleness; God has appointed that the greater part of this time should be consumed in night, in order that the length of the day might not be superfluous, when men were unable to do anything. Who can describe the perfect order of the seasons; and how these, like some virgins dancing in a circle, succeed one another with the happiest harmony; and how those who are in the middle cease not to pass over to the opposite ones with a gradual and noiseless transition?
Therefore, neither are we overtaken by the summer immediately after winter; nor by the winter immediately after the summer; but mid-way the spring is interposed; that while we gently and gradually take up one season after the other, we may have our bodies hardened to encounter the summer heat without uneasiness. For since sudden changes to opposite extremes are productive of the worst injury and disease, God has contrived that after winter we should take up the spring, and after the spring the summer; and after the summer the autumn; and thus transport us to winter, so that these changes from seasons which are opposite, should come upon us harmlessly and by degrees, through the aid of intermediate ones.
Who then is so wretched and pitiable, that beholding the heavens; and beholding sea, and land; and beholding this exact adjustment of the seasons, and the unfailing order of day and night, he can think that these things happen of their own accord, instead of adoring Him who has arranged them all with a corresponding wisdom!
Source: Homilies on the Statues (New Advent)