Zhuangzi said heaven and earth have great beauty but do not speak of it, nature needs no self-promotion.
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From 《庄子·知北游》 (Zhuangzi, 'Knowledge Wandered North'): 天地有大美而不言,四时有明法而不议,万物有成理而不说 - 'Heaven and earth have great beauty but do not speak of it; the four seasons have clear laws but do not argue them; the myriad things have their patterns but do not explain them.' The Daoist classic's statement that cosmic order is self-evident and wordless.
usage
而 here is the classical conjunction 'yet / but.' 言 = 'to speak.' The whole passage has become a standard epigraph for Chinese landscape photography, nature writing, and minimalist design manifestos.