The day is gone and I yet I saw no sun,
And now I live, and now my life is done.
The spring is past, and yet it hath not sprung,
The fruit is dead, and yet the leaves are green,
My youth is gone, and yet I am but young,
I saw the world, and yet I was not seen,
My thread is cut, and yet it was not spun,
And now I live, and now my life is done.
I sought my death and found it in my womb,
I look't for life and saw it was a shade,
I trode the earth and knew it was my tomb,
And now I die, and now I am but made.
The glass is full, and now the glass is run,
And now I live, and now my life is done.
This is another oxymoron, a contradiction in terms. The full glass may represent his still-vigorous life. It merges with the empty glass, his approaching execution, the negation of his life. But his martyrdom is his fulfillment.  Life and death, execution and spiritual triumph, are conflated. 
 Note that the technique of juxtaposing the same word but in its different meanings is  antistatis . Here “glass” refers in the first clause to a receptacle for drink, and in the second clause it is an hour glass symbolising time.
Tichbornes Elegy