Why exactly was everyone placed on this planet? What exactly are we supposed to do? (Besides being a product of parental shanigans)
Here's my take on it.. perhaps you'll agree.
I think that.. in some way, there is some sort of pre-determined list and the is a "list" that you also form on your own.
Think about it, some of the things that happen in your life have almost been too coincidental. Or sometimes were you really meant to meet certain people in your life?
I think that, in terms of friends, the somehow we were already meant to meet them, like the world already devised this plan. Whether you'd meet at an event, or through a friend or because you set out to get the know them -- the world kind of planned that out already I think. Of course we don't really notice or think of it in this way, but I think it's something to consider.
Continuing, in friendships whether they last for a season or forever, you were meant to to affect their life in someway it was by saying hi or having fun or being always there for them -- there is always a result to any action.
Bottom line, the way you affect a person's life has already been put into place.. even if you make a random decision, that's already been set as well.
There is also the part of your someone's purpose in life that can slightly be altered.. but I havent thought about something that really justifies my claim. I was going to say a person job path or perhaps having children. But if you are supposed to have children, you will.
Ahh these are the random types of things I think about.. that sort of lead to dead ends. And also... I mean i did not really provide the best examples or the most eloquent way of discussing this, but as long as you get the gist of it that's okay with me.