Why not the future?

How I wish, I had a crystal ball
And I could see the future,
For if I can know the past
And the present,
Then why not the future?

Why do I have to wait,
For the future to become the present,
To know what it is and how it is,
What's the suspense all about,
If I've got to live through it anyway.

How can not knowing the future,
Make a difference to my present?
If I knew what's coming,
Would it change my present?
For the better or the worse, would it matter?

If the future depends upon the present and past,
Then knowing what's coming, could help change what comes,
And the future that was known, wouldn't be the future anymore,
So, then, if I know the future,
I still would not know!

Now I know, why it is,
That I know the past and the present,
But not the future,
The future cannot be known,
'Cause it's a trend of the past and present!