If a picture is worth a thousand words, then a good portrait should read like an intimate biography.
For example, the ability to draw a good portrait of another person.
He taught him how to look at a face properly in order to be able to make a good portrait.
"It is a moderately good portrait of an existing original," he said.
"How long does it take you to paint a really good, big portrait?"
I'm sure they got some very good portraits: probably sell them for use in history books of the future.
With the good portraits it's like you actually meet people.
Most of his paintings were landscapes, but he also did some very good portraits.
A good portrait, artists say, should capture a subject's spirit.
He paused a moment, then added, just to make sure, "A good portrait."