How to Prove Oneself?

“Who is wise and understanding among you? Let him show by good conduct that his works are done in wisdom.” (James 3:13)

P/S:

The world teaches you the “opposite”:

Namely, “self-service” to make “oneself filthy rich” (a “selfish” goal) instead of serving others in many ways from family, friends, colleagues, strangers, your community, your country & if possible, your enemies too; now, that’s “good conduct” (a “selfless” act) in “wisdom” as mentioned in the verse above.