This heart is clear, and the sun and the moon can look in the mirror. As I promised, the whole world knows. What do these two sentences mean?

It means that this heart can be placed under the brilliance of the sun and the moon, and the sun and the moon testify for me. The oath is sincere and credible, and heaven knows everything.

The sun and the moon can be used as reference objects. This is a Chinese character, which means that both the sun and the moon can testify.

From Song Qingfa's Waiting: This heart, this ambition, this feeling, heaven and earth as evidence, the sun and the moon can look in the mirror.

Extended data

The enlightenment of this sentence:

Vows cannot witness love, only time can witness love. Vows can only be moved for a while, but not for a lifetime. Don't take vows as aestheticism in love. Aestheticism in love is not to demand each other in the name of love, but to grow together and become each other's sunshine.

You can believe in love, but don't believe in vows. In the most reliable love, vows are not important.

Good love has nothing to do with vows. But what's interesting in this world is that too many people just like to listen to each other's vows of eternal love. Even though I have been hurt by the oath of others, I still want the oath of the other person when I fall in love with another person.