ARI LAURA KREITH Darin F. Earl II and Valerie Terranova co-star in “The Giant Void in My Soul,” at Luna Stage in West Orange. Despite its somewhat daunting title, “The Giant Void in My Soul” — which is being presented, in its regional premiere, by Luna Stage in West Orange through May 22 — is easily accessible and quite life-affirming, with lots of clever twists and a poetic sensibility. The writer, Bernardo Cubría, takes on the biggest of subjects — man’s search for meaning, for lack of a better phrase — with a winningly impish sense of humor. The two central characters, Fool 1 and Fool 2 — p…