This song sounds like a metaphor of the fear to change. Men are afraid of going forward, so they hide themselves behind illusions. The "shore" represents these illusions, but "Behind the shore the sea is filled up with sentiment and strength". The sea represents another way of life, better than the previous one. Then there's a touch of "memento mori" philosophy : we cannot regret the past, or cling to our fears, because there isn't much time left. So men are left with the choice : cling to a past that cannot be revived nor undone - or face the future and free themselves from the Force of the Shore.
This song sounds like a metaphor of the fear to change. Men are afraid of going forward, so they hide themselves behind illusions. The "shore" represents these illusions, but "Behind the shore the sea is filled up with sentiment and strength". The sea represents another way of life, better than the previous one. Then there's a touch of "memento mori" philosophy : we cannot regret the past, or cling to our fears, because there isn't much time left. So men are left with the choice : cling to a past that cannot be revived nor undone - or face the future and free themselves from the Force of the Shore.