Yogi: When a defilement becomes very strong, will thinking about anicca, dukkha and anatta help?
Sayadaw: No. You already know the meaning of anicca, dukkha and anatta, right? So, no need.
When you see changing and the mind understands, let the mind say it. You don’t have to think about it.
Even when you can see the object change or disappear, just recognize that it has disappeared. That’s enough.
Don’t say ‘Ah, it’s impermanent!’ If the mind really understands, it can say by it itself.
You don’t have to contemplate it – just say ‘Disappear, okay, disappear.’
Your duty is to acknowledge that something is happening when something arises, and something has disappeared when something disappears.
When you see this experience many times, if the mind has matured, it can see by itself. This is true understanding.