In Albert Camus’s novel The Fall (1956), Clamence reflects to a stranger:
I knew a man who gave 20 years of his life to a scatterbrained woman, sacrificing everything to her, his friendships, his work, the very respectability of his life, and who one evening recognised that he had never loved her. He had been bored, that’s all, bored like most people. Hence he had made himself out of whole cloth a life full of complications and drama. Something must happen – and that explains most human commitments. Something must happen, even loveless slavery, even war or death.
BOREDOM IS BUT A WINDOW TO A SUNNY DAY BEYOND THE GLOOM