Knowledge changes all the time. When we engage with the world, when we encounter data or new experiences, our knowledge changes.
But belief is what we call the things that stick around, particularly and especially in the face of changes in knowledge.
While more knowledge can change belief, it usually doesn’t. Belief is a cultural phenomenon, created in conjunction with the people around us.
The easy way to discern the two: “What would you need to see or learn to change your mind about that?”