Worship and Emotion

[Astreja]

To serve the idea well, you have to develop feelings for it.

I agree with this.  If you have no particular feelings for something, it would be unlikely to play a major role in your life and there would be little incentive to do it, let alone do it well.

Emotions, idea, acts.

"Emotions" to an illusion is the problem's core.

Feelings come first.

I think the idea would have to come first, as an illusion would have to establish some sort of presence in the mind before generating any emotional response (as emotions are reactive rather than proactive).