No, don't delete your old material! As people discover you later, they'll want archives to go back to. Also, you can link to old posts later on in future posts and keep people reading on your page. Save everything! Be a digital hoarder!
VERY valid point! However, as I fumble along, trying to find my way... I highly doubt that anyone wants/needs or desires to read such nonsensical rhetoric that has nothing to do with a creative process.
Welcome to my ramblings!