I Am The Personification Of Time

I was here before the universe was formed  
Total darkness surrounded me  
And then there were celestial lights  
When no life form existed, I was here  

I am not what you think I am  
You wonder about my endless existence,  
But you will never understand me  
I am the most mysterious entity  
 
No one can ever estimate my age,  
Neither can anyone outlive me  
I have seen the birth of generations  
And I have seen the death of generations  
 
Everything came into existence after me  
And I will still be here after everything is gone  
I am the past, the present, and the future  
Time is my name; I wait for no one  
 
I am the personification of time  
Nothing can stop me from going on  
I have no beginning and I have no end  
There is no one like me; I am everlasting time