St Theodore the Studite, in his 68th Catechesis, writes:
Brethren and fathers, because winter has passed and spring has arrived, we see creation flourishing again; the plants are flowering, the earth is growing green, the birds are singing and everything else is being renewed; and we take pleasure in all this and we glorify God the master craftsman who transforms and changes creation year by year, and it is reasonable to do so. Ever since the creation of the world his eternal power and divine nature, invisible though they are, have been understood and seen through the things he has made [Rom. 1:20]. It is our duty not just to stay where we are, but to advance further and to examine carefully for ourselves the logic of creation. How? Because this renewal has winter as its cause. It would not have reached its prime had it not first undergone snows and rains and winds. And so it is with the soul; unless it is first snowed on by afflictions, troubles and difficulties, it will not flower, it will not fruit; but by enduring, it bears fruit and partakes in a blessing from God, as it is written: Ground that drinks up the rain falling on it repeatedly, and that produces a crop useful to those for whom it is cultivated, partakes in a blessing from God [Heb. 6:7]. Therefore, brethren, let us also endure every affliction, every trouble, every trial which assails us both visibly and invisibly, the fast we are drawing out as we hunger and thirst and are otherwise made wretched, so that we may bear fruit and partake of God's blessing; and not only that, but that we may nourish and welcome Jesus as our guest. For just as we enjoy the sight of creation, so he too enjoys the ripe beauty of our souls. What are the fruits? Love, joy, peace, patience, goodness, generosity, faithfulness, gentleness, self-mastery [Gal. 5:22]. By these he is nourished, by these he is entertained.This essay makes a good companion piece.