which are often lost 是修饰前面整个句子的吗？

we should live each day with a gentlenes,a vigor,and a kneeness of appreciation which are often lost when time stretches before us in the constant panorama of more days months and years to come.

这里的 which are often lost 是修饰前面的we should live each day with a gentlenes,a vigor,and a kneeness of appreciation 对吗？

是修饰 gentlenes,vigor, kneeness of appreciation 的