http://elderscrolls.blogspot.com/2005/10/loveletter-from-fifth-era.html

Can someone explain what the hell it says? It's almost senseless to me.

Well, first it is important to understand that it is, for a large part, an elaboration on one of the latter sermons ( 35?? Anyone?? ) all the text in italics is quoted from that sermon.

It tells of landfall, an apocolyptic event, and it tells us how to avoid "the perils of landfall".

It's a letter from the fifth era that is instructing us to love.