This seems important to me, because my first impression is that the author is saying something about human life (the flowers in spring) in the face of eternity (the ocean).

这对我来说非常重要。我的第一感觉是，诗人试图描绘的是永恒(大海)和生命(春天的花)。

youdao

This is how this logic goes -- we are all familiar with this: our body remains to molder in the earth or welter in the ocean , but our incorporeal spirit rises to heaven where it can enjoy an ethereal, a bodiless, world of eternity.

就是这种逻辑--我们都熟悉这个：,我们的肉体在地下或是海底归于腐朽,但灵魂却会升入天堂,在那里享受无形的永生。

耶鲁公开课 - 弥尔顿课程节选