Beautiful hands are those that do.

Let us try to extract what is being talked about here:

1. What is beautiful hand?
2. When will you say that a person has a beautiful hands?
3. What is bing done by these beautiful hands?
4. Could you consider a “green thumb” beautiful hand too?

Suggested answers:

1. A beautiful hands are those that _______________.

a) are working everyday. b) till the plants. c) with good writings.

2. A person has a beautiful hands when he/she uses it __________________.

a) for helping other b) in good ways. c) (and the likes)

For some other reasons we could go beyond what is being implied in the quotation. Literally, it is not exactly the hands that work is being emphasize here, but a person who does the job responsibly. You can still extract other point of views about it.