You can disceern if a person have wisdom. The culture can discern if you are wise or stupid.
The actions comes from the human heart.
If a person is guided by the Bible then the actions will be trustworthy. The Bible gives wisdom to mankind, if the person wants to be wise.
I desire to follow the Bible. The world mock at the Bible but the world is in trouble. When I have the Bible in my heart then I avoid the troubles of this world.
A person can decide to be a fool. If a person reject the Bible then that person will do foolish things.
If a person wants to be a fool then reject God and the Bible.