Poems in a way are spells against death. They are milestones, to see where you were then from where you are now. To perpetuate your feelings, to establish them. If you have in any way touched the central heart of mankind's feelings, you'll survive.
Several tons of dynamite are set off in this picture - none of it under the right people.
As for the stage fright, it never goes away. When I'm waiting in the wings to go on, it's agony every single time but I stay focused and I know that once I'm on stage it'll be fine; I'll be in my happy little bubble.