天不曾怀疑海的蓝海不曾怀疑天的蓝
[tiān bù céng huái yí hăi de lán hăi bù céng huái yí tiān de lán]
This is a beautiful poetic line conveying mutual acceptance and understanding between two different elements - the sky does not question the color of the sea and vice versa. It reflects harmony, non-judgmental attitude, and coexistence despite differences.