When I was a child, adults would tell me not to make things up, warning me of what would happen if I did. As far as I can tell so far, it seems to involve lots of foreign travel and not having to get up too early in the morning.

The quote is referring to the consequences of lying. When someone makes things up, they often experience consequences such as traveling to unfamiliar places (foreign travel) and not having the same structure to their day that they would have to follow if they hadn’t made things up (not having to get up too early in the morning). Essentially, this quote is implying that the consequences of lying can be a lack of stability and reduced responsibilities.