1, yes, we should learn to appreciate every detail in life, including darkness and brightness, which all constitute a colorful life.
This is a thoughtful sentence. Everyone will experience the ups and downs of life and different situations, but it is this contrast that makes us cherish those brilliant moments more.
3. This sentence is too good. Whether it is dim or brilliant, it is a part of life. We should learn to balance and accept them and cherish every moment.