Iyengar translation of sutra 4.8:
"These three types of actions leave impressions which becomes manifest when conditions are favourable and ripe."
He writes that we have four types of actions, the first three leaves impression and memory, that builds a base for desires or disturbance (such as anger, lust, greed, infatuation, pride and envy). The desires and disturbances can rise right a way, but they can also become dormant.
But Patanjali describes a way out; even when in desire or in disturbance, if we turn our consciousness towards the inner seer, through the path of yoga, we can practice the fourth type of action that have no desire and no disturbance.

I relate to this through the instruction to recreate serenity in the inner environment by softening the face, throat and abdomen, and letting breath be smooth and even. To stabilize the mind and be able to see more clearly, more neutral again.
I also relate this to one of the good things by showing up and taking classes. Just follow the lead of a teacher, sometimes this brings me more neutrality from my disturbances about wants and don't wants. (sometimes not)
At least I do what I don't want in a class situation - at home I sometime just skip the annoying or provoking asanas:-) that might be good for me.

I know this in getting over grave challenges- it all (old crap)surfaces again (have tried so many therapeutic and self-help techniques), unless I give it to great reality (path of yoga).

So my guideline is to show up and go for neutrality, soften face abdomen and throat and smooth even breath.
Namasté