human beings are the only creatures able to contemplate on the very transience of existence, aka the end of our own time on earth. our existence can therefore be seen as 'the isolated unknown given amount of time'. the verb explaining this must be: waiting. if you isolate time, you have waiting, and if you're not sure what you're waiting for, you always know this: in the end you're going to die. so, to wait is to wait to die.