In our physical body, the head is the seat of knowledge.

"In our physical body, the head is the seat of knowledge, while
power is situated in the arms and legs, which are for doing and
moving. Between the head and the limbs lies the heart. Without
the heart, the head and the limbs would be unable to function. It
is the heart that keeps them working; it contracts and expands
all the time so that the blood – life – can continue to
circulate. If the heart stops, everything else stops too.
But humans have abandoned the heart, symbolically speaking, and
gone in search of power. And as money gives a great deal of
power, they do all they can to obtain as much money as possible,
with no consideration for what they make others suffer, and their
heart hardens. They also seek knowledge, but as their goal is not
a selfless one their knowledge only serves to lead them astray.
This is why they are not happy. They are undoubtedly more
powerful and more learned, but they are not happy. To be happy,
they must return to the qualities of the heart – kindness,
gentleness, generosity and forgiveness."

Omraam Mikhaël Aïvanhov