I listened again to a story by Ajahn Brahm about a Thai monk who had failed several times at elementary school, so he was ordained but he could not learn the chants, so he was sent to a Thai forest monastery and there he got enlightened very quickly because his meditation was so good since his mind was very simple. The story is e.g. here at 59:58
I was wondering whether anyone knew about this monk (Ajahn Brahm says he forgot the name) and whether a biography or more information about his life was available.
I liked the story as it shows the path is about purity of mind rather than intellectual prowess.