see (someone or something) in a new light
To perceive, regard, or understand someone or something in a new, typically more positive way. Now that I know more about the way it will work, I've been seeing the proposed legislation in a new light. You really start to see your parents in a new light once you have children of your own.
see someone or something in a new light
Fig. to understand someone or something in a different way [than before]. After we had a little discussion, I began to see Fred in a new light. I can now see the problem in a new light.