"Well, I love fishing. I wouldn't kill a fly myself but I've no hesitation in killing a fish. A lot of men are like that. No bother. Out you come. Thump. And that's not the only reason"

This quote by Norman MacCaig is a reflection on the human relationship with nature. He is recommending that humans tend to be selective in their relationship with nature, as he himself enjoys fishing but would not eliminate a fly. He is suggesting that lots of people are like this, and that it is not a problem. He is also suggesting that there is more to fishing than simply eliminating the fish, suggesting that there is a much deeper connection between humans and nature. This quote is a suggestion that people must bear in mind their relationship with nature, which there is more to it than just drawing from it. It is a pointer that human beings need to be respectful of nature and value its appeal.