The ancient perpetual truths prove, at each fresh enunciation, not only surprising, but incredible. The reason is, that they overfill the vessels of men's credence. If you pour the Atlantic Ocean into a pint basin, what can the basin do but refuse to contain it, and so spill it over? Universal truths are as spacious and profound as the universe itself; and for the cerebral capacity of most of us the universe is really somewhat large! But as the major numbers of mankind are too little self-reverent to dispense with the services of self-conceit, they like to think themselves equal, and very easily equal, to any truth, and habitually assume their extempore, off-hand notion of its significance as a perfect measure of the fact. As if a man hollowed his hand, and, dipping it full out of Lake Superior, said, "Lake Superior just fills my hand!" To how many are the words _God, Love, Immortality_ just such complacent handfuls! And when some mariner of God seizes them with loving mighty arms, and bears them in his bark beyond sight of their wonted shores, what wonder that they perceive not the identity of this sky-circled sea with their accustomed handful? Yet, despite egotism and narrowness of brain and every other limitation, the spirit of man will claim its privilege and assert its affinity with all truth; and in such measure as one utters the pure heart of mankind, and states the real relationships of human nature, is he sure of ultimate audience and sufficing love. ERICSSON AND HIS INVENTIONS. No events of the present war will be longer remembered, or will hold a more prominent place in History, than those which took place on the eighth and ninth of March in Hampton Roads, when the Rebel steamer Merrimack attacked the Federal fleet. We all know what havoc she made in her first day's work. When the story of her triumphs flashed over the wires, it fell like a thunderbolt upon all loyal hearts. The Cumberland, manned by as gallant a crew as ever fought under the Stars and Stripes, had gone down helplessly before her. The Congress, half-manned, but bravely defended, had been captured and burnt. Sailing frigates, such as were deemed formidable in the days of Hull and Decatur, and which some of our old sea-dogs still believed to be the main stay of the navy, were found to be worse than useless against this strange antagonist. Our finest steam-frigates, though accidentally prevented from getting fairly into action, seemed likely, however skilfully handled, to have proved almost as inefficient; for all our batteries and broadsides had produced no effect on this iron-clad monster. She had gone back to her lair uninjured. What was to prevent her from coming out again to break the blockade, bombard our seaports, sink and destroy everything that came in her way?