1. what does the poet mean by the 'inhuman dearth of noble natures'?
2. what are the causes of our sadness?
3. what are the'unhealthy and over-darkened ways' ?
4. according to the poet, which things give us relief and joy?

1) There is a general lack of nobility in human natures and the lack is so large in proportion that it is almost common to be inhuman.
2) Reflection upon our own mortality and the fleeting nature of human happiness are contributing factors towards creating sadness,