明日は明日の風が吹く tells you not to borrow tomorrow's trouble. The wind is fortune, the way things blow, and each day brings its own. The proverb has two faces: a shrug, let it blow, and a hope that a better wind may come. The doubled 明日 is its shape, as for tomorrow, then tomorrow's. It is also read asu wa asu no kaze ga fuku.
The proverb is in print by 1784, already a saying in a young man's mouth in Tsukitei Kashō 月亭可笑's novel of the Naitō Shinjuku pleasure quarter, 角鶏卵, more than a century and a half before the film Gone with the Wind, released in Japan in 1952, borrowed it for Scarlett's tomorrow is another day.
We want you to be as happy with the meaning as you are with Master Takase's art. To learn more, visit Philology of 明日は明日の風が吹く.