He is really knowledgeable and always teaches us new information.

I am thinking of learning Greek.

He has many Greek friends.

He is an expert in mythology and gave a lecture on the gods of ancient Greece.

Andromeda is one of the brightest constellations in the night sky.

The characters in this story are very attractive.

The philosophy of Ancient Greece has a significant influence on modern thinking.

It's better for him not to know the truth. After all, ignorance is bliss.

He is feigning ignorance about that problem.

He knows that pain through his own experience.