40 is not confusing, and 50 knows the destiny. What do you mean by not being confused and knowing your destiny? It belongs to ancient Chinese and I don't know much about it.

40 is not confused, indicating that there are fewer questions about the world. After the age of 40, people began to explore themselves more, and also began to let go of external things and know their own destiny. Because after exploring yourself to a certain depth, I began to know the meaning of life and had a good view of life and death. Knowing the laws of nature, people will settle down.