For the curious, some googling shows that the text at the bottom is "...and you cannot step twice into the same stream." This is the end of a quote from Plato's Cratylus, the beginning of which is "All things move and nothing remains still..."

Does anyone know the context of the quote?

Wikipedia page of greek phrases, see #27

You shouldn't expect something to have the same result if you do it a second time. —
Actually, Voron, it's more of a metaphysical claim than any parcel of 'life wisdom'. There are multiple possible readings, but the two usual ones are "some (or all) objects, despite being understood as objects, are processes and have no permanence" and, in reflection, "the realisation of the permanence of the person stepping in the river is the result of the impermanence of the surroundings". There are, however, multiple fragments of ancient texts containing variations of this text, called "River fragments" and they dont all permits the same interpretation. The idea behind Plato's quote is refered to has the doctrine of the heraclitean flux. —
I get the impression Akanthinos knows this subject matter somewhat better than me, but I'm gonna wade in anyway, mainly because I think it's important to attribute this quote to Heraclitus rather than Plato. We don't have a whole bunch of Heraclitus' text - it's all just quotes from other authors - but he's generally reckoned to be a thinker of chaos, flux and paradox. You can't step into the same river twice because the water has moved on, which is to say a thing is not identical with itself from moment to moment. —
It's philosphy from a sage... —
Yes, Sage is a quote from Plato's Cratylus, which itself is a quote from a course Heraclitus gave that Plato supposedly attended earlier in his life. —