Object

A poem is but a thought collected 
like tempered steel, its silver flame detected; 
and should the forge cool down its raging fire, 
still words will never cease to fuel my desire. 
A poem is but an open cage: 
there's structure, form, and youth in age. 
Some words, with clipped wings, cant fly 
but on the ground their message will not die. 
A poem is but an island getaway - 
its an oasis in the desert far away, 
and if you dont like summer you can stay 
where winter's melancholy rules the day. 
A poem small can take the world by force; 
a few dead words to change history's course.

what is a poem?