"Faster than a speeding bullet!" Clark Kent catches a bullet. Superman flies last enough to break the time barrier, which is considerably faster than a speeding bullet.
"More powerful than a locomotive!" Superman supports a train on his back. Superman moves tectonic plates bare handedly.
""Able to leap tall buildings in a single bound!" Superman catches a falling Lois Lane and helicopter and replaces them on top of the Daily Planet in a single motion.
"Superman! Strange visitor from a distant planet." The infant Kal-El is sent to Terra from the dying Krypton, is raised by Jonathan and Martha Kent, and becomes Superman
"Superman! Who can change the course of mighty rivers;" Superman dams up a flooding river.
"Bend steel in his bare hands;" Superman bends the steel railroad rails in his bare hands.
"And who, disguised as Clark Kent," Technically, he is Clark Kent; the Kent's adopted him and named him Clark.
"Fights a never ending battle for truth, justice, and the American way!" Superman literally tells that to Lois Lane as his mission statement... and adds that he never lies.