The true meaning of sincerity lies not in exchange, but in willingness. There is indeed value exchange between people, but this "value" is not equal to "benefit." Whether this exchange is utilitarian is the standard for determining whether it is "sincere and genuine." "Sincerity" means I am willing to give, and it is the "cause" for which I strive; while the reward is the natural "effect" that follows the effort, and in this regard, I let it be without forcing it.

But if the effort is calculated based on "what I want to get" and the effort is priced, then it is not sincere and will indeed turn into moral coercion. True sincerity is my willingness to give, my doing my best in the "cause" and letting the "effect" take its course.

Sincerity may sometimes be met with heartlessness, but the one who loses is never the one who once bravely gave.

Sincerity is not about not seeking rewards but knowing that rewards are not the "effect of exchange" but the "natural return of the cause." Only those who can achieve this can truly be called "warriors" of love.