At HUMAS System, we deliberately identify four types of human energy:
physical, intellectual, emotional, and cognitive.

Each of them is concrete, measurable through action, and directly reflected in reality:
— bodily effort,
— mental work,
— emotional connection,
— perception and orientation in information.

The term “mental energy” is often used in esoteric, psychological, or casual contexts. It is vague.
Some associate it with focus, others with willpower or motivation. In science, the term is rarely used. In philosophy, it is overloaded with loose interpretations.

In HUMAS System, we intentionally avoid abstract or unclear concepts.
If a type of energy cannot be connected to real behavior, decisions, or interaction — it’s not considered a foundational axis.

That’s why we don’t use the term “mental energy.”
Not because it’s wrong — but because it lacks precision.

We are building a new system of values — and it begins with clarity.
Even if that means letting go of familiar words.