What is "moralise"

Usage examples of "moralise".

When I stalked out like that from the library in fine mood to moralise and apostrophise heaven in a way that would no doubt have looked fine upon these pages, one sprightly damsel, just as the gloomy rhetoric was bursting from my lips, thrust a flower under my nose whose scent brought on a violent attack of sneezing, her companions joining hands and dancing round me while they imitated my agony.