I don't think jejune stars, as he uses it here, is an oxymoron. While jejune can mean dull/boring/lacking in originality, etc - it can also mean childish (in terms of one's understanding of a subject). So when i read the title of the song (long before I heard it or read the lyrics), my first thought was "Baby Stars" - which ties in a bit to the Ladder Song's reference to a star being born. I think the idea here is that we are just at the beginning of our consciousness - that when we live a long life and die feeling old and decrepit, we'll still be just babies in terms of the universe. You see shades of this in Beginner's Mind (with the reference to dying young at heart) and even back in Don't Know When But A Day's Gonna Come (I'm not a child, I'm so much younger than that.)
I don't think jejune stars, as he uses it here, is an oxymoron. While jejune can mean dull/boring/lacking in originality, etc - it can also mean childish (in terms of one's understanding of a subject). So when i read the title of the song (long before I heard it or read the lyrics), my first thought was "Baby Stars" - which ties in a bit to the Ladder Song's reference to a star being born. I think the idea here is that we are just at the beginning of our consciousness - that when we live a long life and die feeling old and decrepit, we'll still be just babies in terms of the universe. You see shades of this in Beginner's Mind (with the reference to dying young at heart) and even back in Don't Know When But A Day's Gonna Come (I'm not a child, I'm so much younger than that.)