Success

Success is the theme where the difference between a quotation and a slogan is easiest to see. A slogan promises an outcome; a quote worth keeping usually names a cost. That is why the most durable lines about success are so often about failure — the number of attempts, the years without result, what had to be given up along the way.

It is also worth noticing that the definition shifts by era. For ancient writers success sat close to virtue and had little to do with property; in the nineteenth century it attached to work and ascent; today it most often means visibility. One word, three measures. While reading, it helps to ask whose measure a line is using before applying it to your own.