It's a depressing thought
Sometimes I'll walk down a street, and every time a person passes me, I'll think, "I'm never going to see that person again".
It takes just under 8 seconds for my mind to look like this:
We have a new philosophy lecturer, who made a striking impression on me when he introduced himself and had to refer to his clipboard for his own name. Eyes like feline amber, head wrapped in an alternate dimension. When he speaks, his hands flap like he's waving aside the mists between our dimension and his, to impart his philosophical wisdom in a voice muffled by unorthodox distance.
He's a little strange, but his intriguing words plunge into the mind and wreak thoughtful havoc. He lectured on the nature of knowledge; the more he said "know", the more I didn't know. My notes are covered in irony.
One last thing. There isn't a word to describe that feeling you get when you suddenly find out that there might be a semester paper to hand in for the next day. There should be, because "fear" just doesn't cut it.