天不曾怀疑海的深海不曾怀疑天的蓝
[tiān bù céng huái yí hăi de shēn hăi bù céng huái yí tiān de lán]
In English, it says 'The sky has never doubted the depth of the sea; the sea has never doubted the blue of the sky.' The profound meaning behind these words is about trust, understanding, and the unchangeable faith between entities despite their different natures or appearances.