 With this end in view he set himself to combat, wherever he thought he found its traces, the separatist spirit that had, of old, allied itself with Gallicanism and Jansenism.With a strategic skill which deserves special recognition, Dom Guéranger worked on the principle that to suppress what is wrong, the thing must be replaced, and he laboured hard to supplant everywhere whatever reflected the opinion he was fighting.He fought to have the Roman liturgy substituted for the diocesan liturgies, and he lived to see his efforts in this line crowned with complete success.