Well, we know in school that the second law tells us in an isolated system, entropy always increases. But when it is expressed as "in an isolated system, entropy never decreases" , it gives me the feeling that it also never increases, and equilibrium is the destination of the isolated system.

Thanks in advance

********************

The second law of thermodynamics ensures (through statistical probability) that two bodies of different temperature, when brought into contact with each other and isolated from the rest of the Universe, will evolve to a thermodynamic equilibrium in which both bodies have approximately the same temperature.[6] The second law is also expressed as the assertion that

**in an isolated system, entropy never decreases**.[6]

-Wiki

Source