G.K.Chesterton 
Manalive 

"Manalive " describes a group of young disillusioned people meeting a certain Mr. Innocent Smith, a bubbly, high-spirited gentleman who literally falls into their midst. Accused of murder and denounced as a bigamist and living in various houses (all of which turn out to be his own), Smith prompts his newfound acquaintances to recognise an important idea: that life is worth living.