Illusion is almost like faith, but there is a difference: we see an illusion.
Intelligence is recognizing the difference. Wisdom is making choices based on past experiences. Knowledge is something dated and communicated about an experience.
The learner still needs the illusion of what they know through experience. They need to use real and concrete elements; such as knowing that something that goes up, under certain conditions, comes down... to begin understanding the environment they live in.
But there are things we cannot observe directly with our own eyes. We can understand them through the lenses of nature, through their effects and through the traces they leave behind.
It does not mean that we do not see. It means that we cannot directly see what happened; we can see the traces that show that something happened.
Imagine that we are on a road. Up ahead, we see skid marks on the ground: nothing but tire marks left by rubber on the asphalt. We did not see the vehicle. Even so, we may conclude that a truck passed through there and braked.
The truck is not before our eyes. What we have is the trace. From that trace, we construct an understanding of what happened.
This is where intelligence must recognize the difference between what we see, what we know, and what we deduce.
Illusion can arise precisely in that space: we see something real, but what we believe we have understood may not be exactly reality.
That is why we need to see the mechanism at work. Not merely know information about it, but perceive how it works through experience, recognize its differences, and then use that understanding wisely to make choices and comprehend the environment in which we live.