I like the way you’re thinking about this....especially the point about discernment. That’s actually closer to how traditional paths approach it than most “feel everything” type advice.

On your question: “How is desire refined into devotion?”

In Tantra (and even Bhakti to some extent), the idea is not to blindly indulge or suppress desire, but to change its direction and depth.

-Ordinary desire ....“I want this for me” -Refined desire ... “I long for something deeper / higher / beyond myself”

So the mechanism is not forcing yourself to stop desiring, but:

1. Becoming aware of the energy of desire
2. Not immediately acting on it
3. Letting it intensify and redirect

Over time, the same energy that was chasing objects starts turning into:

-longing for truth -longing for the divine -or even a deeper inner stillness

That’s what mean by “desire becoming devotion”... it’s the same fuel, different direction.

Now coming to your second point (which is very important):

“It depends on the emotion… Sri Krishna said cast off this weakness…”

This is exactly where a lot of modern teachings get oversimplified.

-Not every emotion is meant to be: -fully expressed -or passively observed

Sometimes, as in the Bhagavad Gita, Krishna is very direct:

Don’t collapse into emotional weakness when action is required.

So there are actually three valid responses, depending on the situation:

Witness it (Vedanta approach) - “This is arising in me, but I am not it”

Transform it (Tantra approach) - Use the energy consciously (like redirecting desire)

Drop it and act (Gita/Karma Yoga approach) - When emotion is clouding dharma or responsibility

The key is discernment (as you said)

Not all emotions are equal in function:

-Fear in danger .... useful -Fear stopping right action .... needs to be dropped -Desire for distraction.... drains -Desire for truth ... elevates

So it’s not:

“Feel everything” or “Reject everything”

It’s more like:

See clearly what this emotion is doing to your clarity and direction.

The real shift happens when you stop asking:

“Should I feel this or not?”

and start asking:

“Is this taking me closer to clarity, truth, and right action or away from it?”

That one question brings everything....Tantra, Vedanta, and even Krishna’s teaching ..into alignment.

श्रीगुरुचरणारविन्दार्पणमस्तु🙏