I imagine one reason would be that changing your perception changes your perspective. Imagine losing your sight. You would likely gain some insight due to havi

I imagine one reason would be that changing your perception changes your perspective. Imagine losing your sight. You would likely gain some insight due to having a new perspective on the world, due to a change of focus (for want of a better word). I'm not suggesting that this is all that is involved, but I think it's a simple enough idea to relate to. Another example might be that you 'forget' many of the typical human conceptual abstractions that we use to view things as discrete, giving you a stronger sense of connection or relatedness. This can spark insights that you otherwise might not have.