There is no activity that is too lowly in our service of the Kingdom of God – no matter how gifted or intellectual or important we may consider ourselves.
A superior cannot be tied down by any conditions. He might need someone to answer the door or to sweep up and that person must then be convinced that he is more agreeable to God answering the door and sweeping up than he would be if on his own account he were to preach or hear confessions. St. Anthony of Padua spent many years in the kitchen without thinking of complaining.
There is no serving the good God without renunciation.
To Jean Baptiste Mille, 30 May 1832, EO VIII n 423