By the time you're eighty years old you've learned everything. You only have to remember it.

By the time you have your protagonist attempting to assassinate the Pope, you've sort of signaled that everything is on the table.

By the time you know what to do, you're too old to do it.

I'm terrified that I'm genetically predisposed to only having boys. That's frightening. By the time I was 10 years old, and I'm not exaggerating, I knew how to patch drywall.

I tend to be a subscriber to the idea that you have everything you need by the time you're 12 years old to do interesting writing for most of the rest of your life - certainly by the time you're 18.

When I was a kid. I had traveled the world by the time I was 13 years old because of all the competitions I did for inline skating.