We don't stay at one place, not really. We move along with the earth, and what keeps us moving along with earth is gravity - the one force that binds us together.
But we keep moving together and that's how we find our stable ground.
It said so in my Geography Lessons.
And probably, it's the same with people in our lives. You keep growing together without any certainty whatsoever of what life brings along.
At the end of the day, as long as there is that one force that binds us together, know that you have your stable ground.
It says so in my Life Lessons.