In Xunzi, the author emphasized on what can we learn from an earthworm’s living attitude: Single mindedness.

• 蚓无爪牙之利，筋骨之强，上食埃土，下饮黄泉，用心一也
• Earthworms have no sharp claws or teeth, no strong muscle or bones, and yet above ground they feast on the mud, and below they drink at the yellow springs.This is because they keep their mind on one thing

Don’t laugh. It is full of mindfulness if you dig and eat single mindedly like a worm.