Thought. Time comes into existence when one begins to think.
Every minute, hour, day, week, month, mankind feels the urge to keep track of time:
“You said you would do such and such a thing at such and such a time. And now you've changed your plans!”
Not that the change in plan causes any inconvenience, but just the feeling that when you say you would do something at a certain time you ought to do that thing come hell or high water!
Yet, everything else around them time is ignored. Tortoises are not late. An elephant does not stop marching to check its watch. A lioness does not fuss over passing anniversaries.
Mankind alone quantifies time.
Mankind alone consorts the hours of the day, the days of the week, the weeks of the month, and the months of the year.
Mankind alone conforms to an appointment book, a meeting schedule, a daily routine.
Thus, mankind alone suffers a crippling terror that no other living thing experiences: the fear of missing out, of time running out.
When you have surpassed the grand illusion of time you are free, right now.