Pretext, text, context

This was a little confusing for me bust I generally got the gist of it. Pretext like it was mention is the alphabet. It also all goes under to reasoning and rational thinking. Pretext in my opinion is before the story like a prologue of a story and the text is the actual story itself, (rise and falling action) and context is the actual understanding of the story. I could totally be rambling on here but this is all my understanding and a different analogy I can make as to other people’s understanding of this excerpt.