"Is there ever a time when my thoughts are not filled with the sound of your waves?" What do I understand after reading this poem?

That time,

in my thoughts,

there was no clear sound of your waves.

That time,

in my cave,

I didn’t see your old hardness.

Note: The last line of the poem rhymes with ang.

After reading this modern poem, I understand that each other is changing, others are changing, and I am also changing.