The typical, usual homecoming or rather homeflowing...

I know he has a Degree in Science but the focus wasn't biology or maritime...
This is more aligned to his personal love of the sea than anything else [I think].

Nice theory.

Whether or not his notion has merit, it does have poetic sentiment.

Now, just for fun, imagine George W. Bush expressing a poetic sentiment.

This is not by far, the best poetic line that Mr. Kennedy has created but it is not his worst either. Although the meaning of this prophetic poem is often overlooked in a sense of death or maritime love; it is neither! The main concept of what Mr. Kennedy is trying to express is that everyone is equal, and we all feel and work the way that others feel and work; regardless as the other person race or heritage. For this quote came about in the era when Martin Luther King Jr. was on the rise with his passion for equal rights of African Americans and Rosa Parks would not give up her seat due to the inclusion that it was a white persons seat. Kennedy wanted nothing more than to help the liberation of the equality of African Americans, especially in the southern states where racism ran amuck.

The words of a man who spend a lot of his time enjoying the fruits of his father. Many of us have never seen the ocean. We are rather made of clay and shall return to the ground where we came from.

John F. Kennedy, speaking at a dinner for the America’s Cup in September 1962 .

Super Bowl viewers Sunday night may have been surprised to hear late President John F. Kennedy pitching a cruise line. Kennedy utters a memorable quote about how the salt in our bodies is the same as in the ocean, which seemed to suggest that it's a pretty good time for a cruise. There's just one problem: The salt levels in our body and the sea are not the same.

"I really don’t know why it is that all of us are so committed to the sea, except I think it is because in addition to the fact that the sea changes and the light changes, and ships change, it is because we all came from the sea.

And it is an interesting biological fact that all of us have, in our veins the exact same percentage of salt in our blood that exists in the ocean, and, therefore, we have salt in our blood, in our sweat, in our tears. We are tied to the ocean. And when we go back to the sea, whether it is to sail or to watch it we are going back from whence we came.”

Comment:
The percentage of salt in our blood is about 9 g/L -- or .9 percent by weight. The acidity of our blood is tightly controlled by our body chemistry. Even a small change can lead to serious illness.

Seawater, however, on average is around 3.5 percent (35 g/L). Seawater is not universally salty given how much freshwater runs into the ocean at various points, which can drastically lower the salinity.

We certainly do have salt in our bodies, as anyone whose used saline solution or a saline IV can attest. But the concentration is generally higher in seawater.

http://propercourse.blogspot.com.br/2014/01/total-bollocks.html

Some say man you are dirt and too dirt will you return

Long live the sea, but also the land. And us.