I am a rock
The essence of the text is that when you let other people in, you also make yourself very vulnerable, so that if those people, whom you have trusted with your friendship and love, leave you, it will hurt very bad. The writer talks about all the steps he has taken to ensure not getting hurt, which is basically a life in solitude.
You´ll never walk alone
In this text, the important message is that you will never be completely without support. There will always be someone there to stand by your side, someone that believes in you, and will cheer you on when you´re feeling down. Never give up!No Man is an Island
In my opinion, "No man is an Island" means that no man is just himself. It means that every single individual, no matter how small it may seem, is part of something bigger, an entirety. Every man (or woman, mind you) is just as important as any other man or woman.
