Clever people engage with reality through thought or reason, regarded spiritually as the functioning of the material mind, but the foolish and the wise meet on common ground because they engage with reality as it is, just as they see it. The wise see more deeply and with more understanding but both foolish and wise engage with reality at first hand. Nothing comes between them and their perception of things and beings. Their understanding is not analytically derived but direct.
Thought divides and separates. Clever people exist outside the true reality of life because they work through conceptual thinking, living in a world of abstraction and theory rather than what is. For them nothing is seen as it truly is but as theory presents it. They don't see the thing but the image of the thing, a representation. This is a world of duality in which the individual and the world are completely sundered. The individual then projects his own interpretation of the world onto all reality and that includes his own reality. He is cut off from life and lives in a fantasy world of his own manufacturing.
There are a lot of clever people in the world today which is why the world has fallen so far into ignorance. These are people who live through the lower mind which gives them the power to manipulate the material world but completely cuts them off from the spiritual which they end up either denying or interpreting according to their limited concepts. The only way out of the mess they have created for themselves, often, it must be said, out of intellectual arrogance, is for them to simplify. Simplicity in this sense means looking rather than calculating and becoming responsive to the mind in the heart in which feeling and thinking are united and taken to a higher place, higher as in embracing more of reality.
The path of evolution involves human beings developing their own sense of themselves as full individuals. The clever stage is therefore one that must be gone through but it is a stage not a destination. We must move beyond it and not become becalmed in it but that is exactly what has happened to large sections of humanity especially in the Western world though increasingly in the East too. It's like being stuck in adolescence and refusing to grow up. We need to grow up.