Tattvas

The Vishishṭādvaita Philosophy speaks of three tattvas or three ways one can interpret creation. Those three tattvas are:

Chith or the Jīvātmā

Achith or the Prakriti

Īshvara or the Paramātma

Chith or the Jīvātmā refers to the souls of any living being in creation.

Achith, or the Prakriti, refers to nature or surroundings in which the soul would reside.

Īshvara or the Paramātma refers to the Lord, who is the Almighty Supreme Ruler of the universe.

In nature, we observe hundreds of thousands of living creatures, each of which possesses a soul. Therefore, Achith acts as a residence for all that is Chith. From this, we can draw the inference that Chith and Achith are inseparable from one another.

As for Īshvara, He dwells in both Chith and Achith. Thus, Chith and Achith are inseparable from Īshvara.

From this, we establish what is known as Sharīra-Sharīri Bhāva, i.e., the relationship between the dweller and that which dwells. We see that Īshvara lives within Chith and Achith, bringing them together. Hence, Īshvara Tattva is treated as the Ultimate, which controls everything in creation.