Gottfried Leibniz

Indeed every monad must be different from every other. For there are never in nature two beings, which are precisely alike, and in which it is not possible to find some difference which is internal, or based on some intrinsic quality.

German Philosopher

It can have its effect only through the intervention of God, inasmuch as in the ideas of God a monad rightly demands that God, in regulating the rest from the beginning of things, should have regard to itself.

For since it is impossible for a created monad to have a physical influence on the inner nature of another, this is the only way in which one can be dependent on another.

I also take it as granted that every created thing, and consequently the created monad also, is subject to change, and indeed that this change is continual in each one.

T. S. Eliot

The soul is so far from being a monad that we have not only to interpret other souls to ourself but to interpret ourself to ourself.

American Poet

But in simple substances the influence of one monad over another is ideal only.

In computing, 'monad' often relates to functional programming, a coding style focusing on mathematical functions.

Functional Programming

Monads in computing provide a way to handle 'side effects', like changes in state or I/O operations, predictably.

Manage Side Effects

Relates to Leibniz's theory in philosophy, where 'monad' means a fundamental, self-sufficient unit of reality.

Leibniz's Monadology

In biology, 'monad' can refer to a single-celled organism, typically free-living and often in water environments.

Single-Celled Lifeform

When learning biology, 'monad' signifies simplicity among living organisms, as they are comprised of a single cell.

Simplest Life Forms

'Monad' in mathematics usually appears in advanced topics like category theory, symbolizing a specific structure.

Mathematical Structures

In chemistry, a 'monad' can be a single, reactive unit that joins with others to form larger structures.

Chemical Building Blocks

 They called the number one, "the monad," the generator of all other numbers and source of all creation. Numbers were active agents in nature. Plato argued mathematical concepts were concrete and as real as the universe itself, regardless of our knowledge of them.