How can the sun and the moon promote it? The world is suffering. The fairy disappeared without a trace, so the mountain left the white deer. What do these two poems of Su Shi mean?

In Lin Yutang's biography of Su Dongpo, there is

time flies, the sun and the moon circulate endlessly, and too many troubles and worries in the world bind me.

(I also want to find a fairy to be at ease) But there is no trace of the fairy, only the wandering white deer in the mountains.

This is probably Perilla complaining.