Merhaba! I came across "sekiz köşe olmak" in the dictionary and am fascinated by this phrase. It means "to be in very good spirits" or "to be in a very good mood," correct? But what is its derivation? Does the number eight have a special meaning, perhaps in Islam? ... This phrase makes me think of "on cloud nine" in English, which also means to be very happy or euphoric. Evidently, no one is sure where this English phrase came from, but there are many guesses, ranging from the U.S. weather bureau to Dante.

Teşekkürler!

Two equally sized squares, one drawn over the other will give you a star with 8 tips.

This is a very strong and stable geometric form, which represented "Victory" in many cultures.

"Sekiz köşe olmak", when a person is referenced, means being in strong an stable standing, both physically and spiritually.

Thank you, AlphaF! And is this symbol -- one square atop another -- what I sometimes see on mosques? Like this:

http://upload.wikimedia.org/wikipedia/commons/b/b0/ROUB_EL_HIZB_06DE.svg

I do not know the circle in the middle. Without the circle, yes...

Notice. the same symbol is on the gates of AKP Headquarters.