Time in a Palindromic Lesson

You don’t notice that time has passed
Unless
You aren’t having any fun
When that happens
It won’t help to tap on your watch

Measuring sky by sun might work, but
It’s best when you ignore time altogether
Throw away contingencies because
Time will escape you if you don’t

(this poem can be read line by line starting with either the first line working down or the last line working up)