Leukocytes in urine are not a dangerous condition, but they are a sign that you are suffering from an infection or damage. Leukocytes are white blood cells (WBC) that work with the immune system to defend against infectious disease. Damage to the kidneys, ureters, urethra or bladder can cause leukocytes to appear.
Empty vessels is a metaphor for a very shallow person whose thoughts and actions have no significant meaning. Such people are constantly talking or otherwise making noise in an attempt to get attention from other people. The more the person is ignored because he has no real input to give, the louder he will become.
Overloaded boats are caused by DRUNKS piling all their DRUNK FIENDS into a boat that is too small and IT SINKS and EXCESS FUMES usually just BLOW UP THE BOAT and they are RARE incidences... usually when some DRUNK tries to start the engine without turning on the BILDGE BLOWER FIRST.