Yogi: I know anicca, dukkha, and anatta. I understand anicca because everything is impermanent.

Sayadaw: Don’t think about impermanence – intellectual understanding is not strong enough.

You must keep on experiencing the object and mind changing or the object and mind are different, moment to moment. After repeated observations, when the mind understands this, when the realization comes, the mind knows ‘Yes, it is really anicca.’ This is experiential understanding, not intellectual understanding – it is a deeper understanding.

People think that intellectual understanding is good enough, but they don’t truly understand yet.

Whenever you see the object changing, don’t decide that it is anicca – just continue to watch the object changing. Don’t decide that you already know anicca – continue to see the object changing repeatedly until insight arises and decides for you.