Don't wait

I received an email from my friend Hebin today, which is poem "Don't wait". I want to know who wrote it.

Don’t wait for a smile to be nice...

Don’t wait to be loved, to love.

Don’t wait to be lonely, to recognize the value of a friend.

Don’t wait for the best job, to begin to work.

Don’t wait to have a lot, to share a bit.

Don’t wait for the fall, to remember the advice

Don’t wait for pain, to believe in prayer.

Don’t wait to have time, to be able to serve.

Don’t wait for anybody else pain, to ask for apologies...

...neither separation to make it up.

Don’t wait...

Because you don't know how long it will take.