I would describe someone's mind as beautiful if this person combines knowledge and intelligence in order to serve the weak and the poor. Pure, good intention plus the ability to forgive is the golden laurel wreath which ornates a 'beautiful mind'. Although good intention and forgiveness seem to me more related to one's heart than mind.

it's the opposite of dirty mind.

Hi... so many meanings... for me it is a person who think with his/her heart...

its hard to define when people have special knowledge that they have.but in others they see it on a different way. cowboy...

That's easy. One worth talking to.