The Houston Chronicle October 23, 1994, Sunday, 2 STAR Edition LARRY NAGER; Scripps Howard News Service ''Universal Mother. '' Sinead O'Connor. Chrysalis/Ensign. It's been almost two years since Sinead announced her retirement from pop music to study grand opera. So, naturally, here's her new pop album. But O'Connor's never been afraid to contradict herself. ''Universal Mother,'' named for the goddess, opens with a speech by Germaine Greer about her cure for the patriarchal system, which Greer says is not matriarchy but fraternity. Musically, the album emphasizes the folksy, ethereal quality of O'Connor's voice. Her voice works beautifully here. The album's first song is also the loudest, as ''Fire on Babylon'' roars and O'Connor sings ambiguously about the biblical whore of Babylon, seemingly meaning the British Empire. Her son, Jake, recites a poem of his titled ''Am I Human,'' followed by O'Connor's most personal song on the album, Red Football. In her reaction to the very fame and controversy she has courted, she sings, ""I'm not no red football to be kicked around the garden. '' She also does Famine, a quasi-rap about England's abuse of Ireland and the alcoholism and child abuse that she says are its results. Along with her own material and that of producer Phil Coulter, O'Connor again proves herself a superb interpreter of unusual outside material. She brings new nuances out of Kurt Cobain's indictment of pop-music fans in his All Apologies. But ever contradictory, she closes her album with an about-face on Thank You for Hearing Me, a song of gratitude to those who have stood by her.