Our worldview, to use a somewhat technical term, helps us organize our life. It is the lens through which we view our experience and make sense of the world around us. I think of worldviews in two broad categories: materialist and non-materialist. The first is what most people associate with the modern world, namely a scientific approach to analyzing the world around us and our place in it. Some prefer to call this secularism to distinguish it from a religious approach to knowledge.
Changing worldview is a journey. Going from religion to science or spirituality to materialism is in my experience quite easy. Going the other way is harder, less likely and takes longer.