We know that all the water in the ocean is salt water. But when the sun takes water from the ocean, in the form of vapor, it is always taken out as fresh water. It leaves the salt behind it. Then the water on the surface of the ocean, from which this vapor has been taken, has more salt in it than the water underneath it. This makes it heavier than the other water. The consequence of this, is that this heavier water, on the top of the ocean, sinks to the bottom; and at the same time the lighter water at the bottom rises to the top. And so a constant change is taking place all over the ocean. The water from the top is sinking to the bottom, and the water from the bottom is rising to the top. And this is one of the means which God employs to keep the waters of the ocean always pure and wholesome. But if the ocean should stop giving away its water, as it has always been doing, then this constant change of its waters would cease. The ocean would be left still and stagnant. It would become a great mass of corruption; and the breezes from the ocean, that now carry health and life to those who breathe them, would carry only disease and death. And the thousands of people who now love the ocean and seek its shores every summer, to get strong and well by breathing the air that sweeps over its surface, and by bathing in its foaming surf, would all be afraid of the ocean; and would keep as far away from its shores as they could. And so we see how the ocean stands before us as a grand illustration of the lesson of liberality which our Saviour taught when he said, "Give, and it shall be given unto you." The ocean gives away its water continually, and, in return for this, God gives it freshness and purity, and makes it a blessing to the world. And so the ocean illustrates the truth of the lesson we are now studying, that "giving is God's rule for getting."