A shore is that happy ending to a ship, the paradise island at the end of the long, tough sea.
In a stark contrast to the Wrecking Ball, this is a ship in which the ship has sailed and eventually made it to paradise. This ship is the hardest possible one to obtain, and very few have made it there alive. After the ship has sailed, people pay careful attention to whether it will continue on course to the shore, or if it will take a wrong turn and get hit with a wrecking ball-glacier. Even if a ship does end up working out, this does not necesarrily mean that the ship is on shore. It is sometimes difficult to tell, and even harder for the people in the actual relationship to tell. Shore is the ultimate goal for every ship.