Sweet and bitter experiences are all part of life.
Tips
culture
In Chinese, each flavor metaphorically represents an emotion: 酸 (sour) = jealousy or heartache, 甜 (sweet) = happiness, 苦 (bitter) = hardship, 辣 (spicy) = intensity or harshness.
usage
This idiom is commonly used to describe someone who has 'been through it all' — a rich or difficult life experience. Often appears with 经历 (to experience) or 尝尽 (to taste fully).