Simple appreciation of the Supreme is called santa-rasa.
In the beginning, this is called santa-rasa, to understand the greatness of God, “God is great.” There is no exchange
You can serve Krsna passively, as Vrndavana land, as tree, as water, so many, as flowers, as fruits. This is called santa rasa.
To realize the creation of God with awe and veneration, appreciation, that is one relationship. This is called santa rasa simply appreciation.
Realization of “Brahman” and “Paramatma” is also a transcendental mellow (Rasa) which is called ‘Santa Rasa,’ a transcendental stage where the transcendental activities are non-manifest.
The acceptance of the greatness of God is called santa-rasa. It is also peaceful realization: “I have realized the greatest.” This is called brahma-bhuta. “I am qualitatively one with the Supreme. I am Brahman, and the Lord is also Brahman.” Suppose a very big man is our very nearest and dearest relative. Are we not proud of it? For example, wouldn’t you feel proud to know that the President were your uncle? Similarly, as soon as one understands that he is Brahman or that Krsna is Param Brahman, he will feel ecstasy. That is called santa-rasa.
When one gets out of the so-called happiness of material life and becomes conscious that God is great, that is called santa-rasa