From things related to suffering in nature to the world, what kind of people does the author associate bitter gourd with?

The author relates bitter gourd, bitter tea, bitter vegetables and bitter almonds to the world, and has struggled in his career all his life, but some people have never tasted Qingjie Sweet Bar? They inserted several "this road is closed" signs at the fork in the road for future generations. The life track of the loser provides a shortcut for the winner. Failure makes future generations wise. Also, who can say whether bitter is sweet or not? You see, in the long voyage, there is a sea of pain, but there is always the other side in the distance. Where bees collect bitter powder, don't rest your wings, you will find a sweet garden. And, interestingly, bitter gourd pulp is actually sweet? It seems that there is sweetness in bitterness and sweetness in hard work. This statement is not groundless, is it?

Oh, be careful of your bitter gourd. Ginger pepper bitter gourd is a special taste. Bitter taste, clear heart and clear eyes, makes people meditate, and makes people look forward to the early broadcast season next spring. Yes, it's not that people don't like bitterness, it's a sweet foil. But people will never get used to eating bitter gourd every day. If you eat bitter and think sweet, there will be hope in life and strength in life.