First of all, Sakyamuni Buddha referred to the traveler as each and every one of us as human beings. It wasn’t only the Buddha who said it in this way. Many sages and wise men of old described life as a journey, and people as being travelers.
No matter how many of these things we may possess, we cannot escape from reaching the grasp of the Tiger of Impermanence. No matter how much material wealth you have, it cannot shield you from dying.
If you hear that “all living things die,” you will agree with it at once. Deep in your mind though, you are still counting the time you have left. “I’m not going to die for another ten or 20 years,” you may say. But it’s shorter than you think.