Those readers who have read this blog over the years, and especially the series on perfection know this principle by heart now.
Holiness starts with complete orthodoxy, complete obedience to Church Teaching in all areas.
If one is unorthodox, in disobedience about one thing, one should not be ministering, as one most likely holds heretical beliefs.
Obedience lays the foundation of all the rest of the gifts.
If there is a priest, nun or lay person into ministry in your diocese and they are in disagreement about one teaching of the Catholic Church, they will lead you away from God.
I am not going to repeat 700 plus posts on the way to become holy. One has all the information one needs under the various perfection series.