I certainly DO KNOW what Jansenism is.  It is the Catholic version of Calvinism---an almost Puritanical version of Catholicism.  And I am well aware of its tenants.  In fact, a lot of Jansenism crept into the Catholic Church in America

Jansenist spirituality was an attempt to control the human passions through self-denial, mortification and asceticism.  This was essential to Jansenists because they feared that if they could not demonstrate control of the passions, they had not really been chosen by God for salvation after all.  A person predestined to salvation, it was thought, will act in a certain way.  

Many priests and nuns coming from Ireland in the late 19th and early 20th centuries were trained in the French theology and spirituality method [of Jansenism].  Too many Catholics were taught to be a suffering people, estimating how many days their aches and pains would get them out of Purgatory.  The joy and love of a savior who loves us was missing.