Who can I be?

So, you have question for say,
Who holds your life?
Well I would say yourself and also God?
Probably? Probability?
IT has become more user friendly.
So if you take I and it out, you get this probably?
You notice how chance is born right?
Chance is lucky 7 but also as they said,
Nasa do not taking chances.
Time to learn then.
Who am I?
Like I said, I can be your teacher.