What does it mean to see high and low at work?

Seeing high and low in work is to distinguish good from bad in work.

What does it mean to look high or low (source: abridged dictionary edition)

Tell the winner and show the pros and cons.

As soon as they met, their chess skills stood out.

A really powerful dinner is to smooth out the things that are difficult to do on weekdays through your coming and going at the dinner table in a pleasant and comfortable atmosphere. People who can do this are usually called "experts".