Cave of Roses lyrics

What is your substance, whereof are you made
That millions of strange shadows on you tend?
Since every one hath, every one, one shade
And you, but one, can every shadow lend
Describe Adonis, and the counterfeit
Is poorly imitated after you;
On Helen's cheek all art of beauty set
And you in Grecian tires are painted new:
Speak of the spring and foison of the year;
The one doth shadow of your beauty show
The other as your bounty doth appear;
And you in every blessed shape we know
In all external grace you have some part
But you like none, none you, for constant heart