We've all heard the saying "God cannot lie", but what is it about Him that makes this so?

I was taking a walk one day, looking at the trees, admiring how their leaves were shedding in preparation for winter. I thought to myself, "Look how the seasons come and go like clock work". God set the seasons in place when he created the earth thousands of years ago, and those very words still stand true today. It is in that moment I had an epiphany, "If everything that you say comes true, how then, is it possible for you to lie?"