$$\mathbf{p} = m\mathbf{v}$$
Where there is mass and velocity, there is momentum. Being a vector, it has a direction.
The momentum of the human’s mindset is a multidimensional vector, and it’s changed through collisions. The collision happens when we are reading, listening, touching, and of course, thinking. Everything we experience contributes to this matrix transformation.
Cogito, ergo sum.