Here are today's Greek proverbs with LOLCats! These are repeats of previous proverbs, but now with illustrations (and there are always more proverbs at the blog):
Πάντα ῥεῖ.
Everything flows.
Note that the neuter plural takes a singular verb, as is the rule in Greek: πάντα (everything = literally, all things) ῥεῖ. Another translation might be: "All things are in flux," or "All situations are fluid." The idea is attributed to the pre-Socratic philosopher Heraclitus.
Σοφίαν ζήλου.
Strive for wisdom.
This is one of the sayings attributed by Stobaeus to the Seven Sages. The verb ζήλου is a middle imperative from the verb ζηλόω, and like many middle verbs it can take a direct object: σοφίαν. From that same root we get both English zealous and jealous. For more about the goddess of wisdom, see Wikipedia: Sophia.
Εἰς ὕδωρ γράφεις.
You're writing on water.
In other words, you are doing something foolish; the water will simply carry your words away. The phrase appears with various prepositions: ἐν ὕδατι γράψει in Plato, καθ᾿ ὕδατος in Lucian, etc., but the idea is always the same: only a fool would write on water! Similarly, only a fool would trust something written on water, as in this saying in Menander: Ἀνδρῶν δὲ φαύλων ὅρκον εἰς ὕδωρ γράφε, "Write the oath of bad men in water," i.e. their words cannot be trusted. From Greek γραφ- we get all the graph words in English, including the word "graph" itself.
Ὄρνιθος γάλα ζητεῖς.
You're trying to get milk from a bird.
This is one of the fool's errands: there are a lot of animals that you can milk, but you are wasting your time trying to get milk from a bird. Compare the English sayings about "hen's teeth" or "blood from a stone."
Τὴν ὀρθὴν βαδίζειν ὁδόν.
To walk the straight path.
Compare the English saying, "to walk the straight and narrow." Metaphorically, this means to proceed honestly, to do the right thing. Although ὁδός is a second-declension noun, it is feminine in gender: τὴν ὀρθὴν ὁδόν. From Greek ὁδός we get the word odometer.
And to finish up, here's a random proverb and a random LOLCat too: