Add the word "your" twice to John Maynard Keynes's wise words and we have the perfect definition of each person's life. "Your ideas shape the course of your history."
Our brains continuously gather information, store some and reject the rest. Our stored information generates thoughts that crystallise into ideas, ideas that dictate how we communicate and to whom, what we do, where we go and how we live.
So the information you store creates the ideas that determine every aspect of the life you lead.
Be very careful what you put in your brain - it will shape your future history.