7 Always learning, while yet they never can come to the knowledge of the truth That fluctuation between various desires, of which he now speaks, is when, having nothing solid in themselves, they are tossed about in all directions. They “learn,” he says, as people do who are under the influence of curiosity, and with a restless mind, but in such a manner as never to arrive at any certainty or truth. It is ill-conducted study, and widely different from knowledge. And yet such persons think themselves prodigiously wise; but what they know is nothing, so long as they do not hold the truth, which is the foundation of all knowledge.