1. "Spiritual spring" refers to spring water that is extraordinary and spiritual. These beetles are actually music lovers. When they vibrate their wings and make sounds, the most beautiful music flows out like a spiritual spring. The author praises these musical performers. Not only is he deeply attracted by them, but he also feels that their music is better than all music in the world. He feels that this is the sound of nature that only insects can play. From this passage and the exclamation mark at the end, We can feel the author's praise for the little creatures of nature.

2. It is their sense of responsibility to society and family and their love for their family that motivate them to work so diligently.