In Oscar Wilde's "The Importance of Being Earnest", he answers this question in the form of brilliant comedy. The play, full of witty dialogue such as Lady Bracknell's answer to her daughter's suitor saying he does smoke; "I am glad to hear it. A man should always have an occupation of some kind."; says, yes, it is important to be Earnest.
One of the more remarkable details of this play is in the title itself. While attending or reading the play, you learn, that the two heroine's of the piece, Gwendolyn and Cecily, are determined to marry men named Earnest; unfortunately, Jack wants to marry Gwendolyn, and Algernon would like to settle down with Cecily. What is the reasonable solution? To tell them that their name's are Earnest. However, Earnest is not only a name, but also a word meaning: an intensely serious state of mind. Why would Oscar Wilde choose the name Earnest for this seemingly ridiculous play anyway?
Why ridiculous you may ask. The answer comes in not only the ingenious dialogue, but in the plot itself. Without giving away the entire story, one can say that the two main characters live, however innocent, deceptive lives and still end up with the fair maiden's in the end. One of them even ends up really being Earnest, to which he answers, "... it is a terrible thing for a man to find out suddenly that all his life he has been speaking nothing but truth..."
Wilde called his piece, "A trivial comedy for serious people." If the word earnest means serious and the play itself is joyfully absurd, this writer imagines that the characters in the play although exceptionally serious about themselves and their lives, they are trivial or ridiculous. In conclusion, I would say that this play is not only suited for the serious mind, this play is uproariously fun for all of us who appreciate good humor.