Answer:
Timid or weak people are said to not have these.
What occurs once in a minute, twice in a moment and never in one thousand years?
What is something you can give away as many times you want without ever losing it?
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
Tomorrow's yesterday. Yesterday's tomorrow. What is it?
As round as an apple. As deep as a cup. All the king's horses can't pull it up.