Predestination is the believe that the future has already been written.  The events of the future have all been pre-defined.  Whatever will be will be.  There is nothing we can do to alter the future.  Regardless of what we do, our actions have been pre-determined.  We are only actors at the mercy of the playwright.

There many be examples of what might appear to some to be predestination in life.

• We will each grow older.
• The sun will come up in the morning.
• Each of us will eventually die.
• -

Some people believe that God had predestined who will "be saved" and who will not.  Others believe that salvation is predestined by certain conditions or actions.

"Whatever will be, will be" was a popular song published in 1956.  Doris Day record the song and it became hit in the United States and the United Kingdom.  The was the theme song of The Doris Day Show.
 
I remember my mother talking about it.  See never liked the song because of its message of predestination.  (My mother was a staunch believer that we controlled our own decisions and that the results of those decisions had great bearing on the subsequent events.

In a nutshell chaos theory suggests that except for the initial condition, everything is predestined.  Repeating with the identical initial condition, the results are exactly the same.

Sound a little like a lot of computer programs.

 
I have been fascinated by Fractals

If I were to accept predestination, then why try?  With a universal excuse, I could do anything I wanted to do (or not do) without any consequence other that what would have happened regardless. 
 
Why, then, do I exist?  For what purpose am I?  Without a purpose, what is my worth? 
 
If I get hurt, there is no need for any medical attention.  After all, what will be will be.

I want things to be positive.  I want things to be good.  I want the world to be a happy place.  I want a God of love.
 
If God has everything all planned out in advance, why is there so much unhappiness, so much suffering, so much inequality?  (Come to think of it, even if things are not predestined, I had many of the same questions.)

-

-