In the same context, I think the following post should be revised.
13. Kammaṭṭhāna (Recitations) for the Sotāpanna Stage
#1
For example, the concept of anicca is understood gradually—from the Sotapanna Anugāmi stage to the Sotāpanna stage. Then how that anicca nature leads to suffering (dukkha) is fully grasped in stages — strengthening at the Sakadāgāmi and Anāgāmi stages — and is fully comprehended at the Arahant stage.