The sky is not less blue because the blind man does not see it. 天不会因瞎子看不见而减其蓝色。

Rain comes after sunshine, and after a dark cloud, a clear sky. 晴日之后有雨水，乌云过去见青天。 Red sky at night, shepherd's delight; Red sky in the morning, shephered's warning. 傍晚天红，牧羊人高兴；早晨天红，牧羊人当心。If the sky falls,we shall catch larks. 天垮了正好抓云雀；不要杞人忧天。