It is true that zeal is the soul of the virtues, but most certainly, Monsieur, it must be according to knowledge, as Saint Paul says; that means: according to knowledge of experience. And because young people ordinarily do not possess this experiential knowledge, their zeal goes to excess, especially in those who have a natural asperity.
Vincent de PaulSince you know the means of getting better, in the name of God, make use of them. Do not take on anything beyond your strength, do not be anxious, do not take things too much to heart, go gently, do not work too long or too hard.
Vincent de PaulFurthermore, the apostolic life does not exclude contemplation but encompasses it and profits by it to know better the eternal truths it must proclaim
Vincent de Paul[M]ost people offend God by passing judgment on the things others do, especially important people, not knowing the reasons why they are doing what they do; for when one does not know the primary cause of some matter, what conclusions can he draw from it?
Vincent de Paul