In Francis Bacon's "Of Truth", why did Bacon say that truth may come to the price of a pearl instead of a diamond?

In this short essay, Bacon is examining reasons why, in his
opinion, people tell lies instead of the truth. In the line you cite, Bacon argues that people
like likes better because lies embellish the truth and make it prettier and more
palatable.

Truth, says Bacon, is like a pearl because a pearl only
looks good in the daylight. A diamond, by contrast, can look good in many sorts of lights. What
he means by this is that the truth is bare and plain and is only palatable in limited
circumstances. Lies, on the other hand, are fancier and can seem beautiful in many different
circumstances.

Truth is therefore less valuable to most people
because it does not really dress up and/or hide reality. People prefer lies because they make
things look better than they really are.