When he talks about drowning, he's referencing the Bible when Jesus walks on water, as so does his disciple Peter. The lesson there is if you have faith in Jesus, you can walk on water/do anything.
Michael here is saying he doesn't believe in that. He believes that if he tried walking on water, he would drown, personally. He's making the choice to reject religion and believe this Earth, our universe, is our one and only home. He's honest with himself and us that he does fear death "I can't say I'm not afraid," but at the same time he's not fearful. He trusts that where we are is where we belong, and that we should focus on making the best of our time here. Not worried about making it to heaven or pleasing a god who probably doesn't exist, at least not in any way we've dreamed up. For me, it's a hopeful message, and I take take comfort in feeling I'm where I belong and have permission to live my best life here, enjoy it while it lasts and helping others in the process.
When he talks about drowning, he's referencing the Bible when Jesus walks on water, as so does his disciple Peter. The lesson there is if you have faith in Jesus, you can walk on water/do anything. Michael here is saying he doesn't believe in that. He believes that if he tried walking on water, he would drown, personally. He's making the choice to reject religion and believe this Earth, our universe, is our one and only home. He's honest with himself and us that he does fear death "I can't say I'm not afraid," but at the same time he's not fearful. He trusts that where we are is where we belong, and that we should focus on making the best of our time here. Not worried about making it to heaven or pleasing a god who probably doesn't exist, at least not in any way we've dreamed up. For me, it's a hopeful message, and I take take comfort in feeling I'm where I belong and have permission to live my best life here, enjoy it while it lasts and helping others in the process.
[Edit: Typo]