History is nothing if not an epic tale of missed opportunities.

What was on the other side?"
Donna said, "He said there was another world on the other side. He could see it."
"He... never went through it?"
"That’s why he kicked the shit out of everything in his apartment; he never thought of going through it, he just admired the doorway and then later he couldn’t see it at all and it was too late. It opened for him a few days and then it was closed and gone forever.

It's estimated that across Africa 100 elephants are killed for their tusks every day. It takes nothing more than simple math to get to what that adds up to in a year, and it's a distressing figure.

We missed too many opportunities. We didn't convert.

Don’t live in regret over missed opportunities, for if you do, you will miss even more.

And my mother, whose radius of travel was short, tied the letters with ribbon and kept them in her desk, When you get the chance, she said to me, "go.