By Allaah, were the hearts sound (pure), they would be saddened at missing out [from goodness to be attained]. How many are the hours which pass by us, and we are prevented from benefitting from them?
However, beneficial knowledge continues and does not cease; its benefit continues, and [likewise] the reward for the one who conveyed it…
[So] how pitiful is the one who is prevented from goodness in his old age for sins committed during [his] youth!
And do not say “may Allaah deal with you” or “may Allaah break your back”, or what is similar to that.