Λέοντα νύσσεις.
You're poking the lion.
More specifically, the verb means to poke something with a sharp stick. Obviously this is NOT something you want to do to a lion. Compare the English saying, "Poke the bear."
Ἔχθρας διάλυε.
Dissolve hatreds.
Φίλοις εὐνόει.
Wish your friends well.
This is another of the maxims that Stobaeus attributed to the Seven Sages. The compound verb εὐνοέω ("well-think") takes a dative complement: φίλοις. The form εὐνόει is a contract imperative; the 3rd-person singular indicative would be εὐνοεῖ, with a difference only in the accent mark. The adjective φίλος is often used substantively as a noun, "friend."
Ἅπας ἐχῖνος τραχύς.
The whole hedgehog is prickly.
As Erasmus explains, this saying refers to a person who is "prickly" by analogy to the prickly hedgehog. In the same way that there is no un-prickly part of a hedgehog that allows you to safely pick it up, so too there are some people who are impossible to deal with no matter what you try to do: they are completely prickly. From the same root in Greek τραχύς we get English trachea, so-called because of the windpipe's bumpy cartilage.
Ἐν τριόδῳ εἰμί.
I'm at a crossroads.
This metaphor works in English as it does in Greek: it means you have to decide which way to go or, more generally, you have to decide what you are going to do. The Greek compound of three-roads intersecting (τρί-οδος) is reflected in the Latin trivium (tri-vium), which gives us English "trivial."
And to finish up, here's a random proverb and a random LOLCat too:
