Final answer:
The quote does not have an attributed speaker from the provided excerpts.
The passages jointly convey that deep intelligence and empathy can lead to greater sensitivity towards suffering and that these experiences shape our collective humanity.
Step-by-step explanation:
The quote "Pain and suffering are always inevitable for a large intelligence and a deep heart. The really great men must, I think, have great sadness on earth."
does not have a directly attributed speaker from these excerpts. However, the sentiments reflect a common theme in literature and philosophy: the burden of deep intelligence and empathy.
The quoted individuals share thoughts on the link between intellectual or emotional depth and the pain that often accompanies sensitivity to life's complexities.
The passages highlight that suffering and joy are the building blocks of human experience, impacting not just the individuals who experience them, but also contribute to the collective human condition.
This collection of excerpts suggests that figures in literature often ponder the nature of sorrow and the human condition, and the necessity of going through such experiences to attain wisdom and compassion.
These ideas resonate with the view that the emotionally and intellectually gifted may be more acutely aware of the sufferings in the world,
resulting in a greater capacity for sadness even as they may also possess a greater capacity for contributing positively to society.