It rains, and the wind is never weary;
...Be still, sad heart! And cease repining;
Behind the clouds is the sun still shining;
Thy fate is the common fate of all,
Into each life some rain must fall,
Some days must be dark and dreary..."
In each life some rain must fall, metaphorical or real, but there is still the sun behind all the dark clouds.
-- From the poem 'The Rainy Day' by Henry Wadsworth Longfellow