[*Update: added a second stanza with additional clues*]  

[*Update 2: changed title, added some clues, added a third stanza, and started a bounty*]

> 
> I am the question that no unerring answer knows   
>  
>  The thought of which does ofttimes give my asker pause   
>  
>  When resolution wavers, he'll reflect   
>  
>  On which solution heretofore considered is correct   
>  
>  Of heartache, of fortune, of death and dreams   
>  
>  In this oration, life's greatest riddles are the themes   
> 
>   
> 
>  You hear me spoken time and time again   
> 
>  For centuries my lasting magic still remains   
> 
>  Fit for a prince, uttered in earnest, sometimes in jest   
> 
>  Of all my kind I surely am one of the best   
> 
>   
> 
>  Now there's a bounty on my head   
> 
>  A bit more work, and I'll be dead   
> 
>  Come on Puzzling, you can win   
> 
>  If you remember all your sins   
> 
>  I puzzle the will, confound the sense   
> 
>  'Tis time to end all the suspense
> 
> 
> 

**What am I?**

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*Remarks:*

1. *The bounty and coveted green check mark will be given to the first correct answer that explains most or all of the clues in the riddle.*
2. *There is only one correct answer, which I'm pretty sure will appear fairly obvious and straightforward once it is pointed out. If you have an idea for a solution but are unsure if it's correct, it probably isn't.*