'ALL my works, all my operas contain one painful love,' wrote the Czech composer Janacek. Janacek, who died in 1928, was tortured by unrequited passion for a married woman 37 years his junior, Kamila Stosslova. Kamila was Janacek's muse; from his adoration and torment poured the musical masterpieces that made his name. Janacek is only one of the poets, artists, musicians and authors whose greatest works were inspired by love, and whose craving for someone - usually inaccessible - dominated their lives. The romance with which Charles Dodgson surrounded young Alice Liddell resulted in the classic children's tales Alice in Wonderland and Through the Looking Glass, which appeared under his pen name, Lewis Carroll. Poet Robert Graves drew inspiration from a series of young and attractive muses who threatened or destroyed his marriages and confused his children. Graham Greene, at the age of 20, played Russian roulette after his first love, Gwendoline Howell, 30, wed her fiance. The first edition volume of his first book, Bobbling April, bears the inscription in Greene's own hand: 'From Graham Greene to GHS, to whom the little that is good here belongs by right.' It seems that unfulfilled love produces excellent creative results. Would Ludwig van Beethoven have composed his greatest works if he had not been torn with longing for romantic fulfilment? Beethoven wrote in his personal diaries: 'Only love, yes! Love alone can give you a happier life. O God grant me the grace to find her at last, the woman who will strengthen me in virtue and whom I can possess with a quiet conscience.' The composer may have been infatuated with a woman named Antonie Brentano, to whom his poem Immortal Beloved, discovered after his death in 1827, may have been addressed. 'Be calm - love me - today - yesterday - what tearful longings for you - my life - my all - farewell. Oh continue to love me - never misjudge the most faithful heart of your beloved - ever thine - ever mine - ever ours.' Composer Robert Schumann's passionate devotion to his fiancee, Clara, and anguish that the marriage was opposed by her father Friedrich Wieck resulted, says author Basil Howitt, in some of his most stupendous work. 'Intense and unfulfilled longing for his beloved drew some heavenly music from Schumann,' says Howitt, in his recently published book, Love Lives of the Great Composers. 'No less than four major works grew out of all his pain and anguish.' Howitt says: 'My cumulative impression is that suffering and angst in love have produced more great arts than has happiness.'