How might Buddha have seen how far the gratification, danger and escape extend?

In "The Connected Discourses" Buddha says > “Bhikkhus, I set out seeking the gratification in form. Whatever > gratification there is in form—that I discovered. I have clearly seen > with wisdom just how far the gratification in form extends. > > “Bhikkhus, I set out seeking the danger in form. Whatever danger there is in form—that I discovered. I have clearly seen with wisdom > just how far the danger in form extends. > “Bhikkhus, I set out seeking the escape from form. Whatever escape there is from form—that I discovered. I have clearly seen with > wisdom just how far the escape from form extends. How might he have seen how far the gratification, danger and escape extend? Did he elaborate on this any where else?