Tony Kayala, c.s.c.:
Zeal: The components for right motivation, they say, are
a) Passion (zeal, intensity, enthusiasm),
b) Direction (remember even the terrorists and ISIS have passion, but not the right direction. St. Paul had a great passion as a persecutor until the Damascus experience)c) Perseverance (persistence, never give up. Abraham Lincoln faced every sort of setback, adversity and failure from 1832 to 1856 but was elected President in 1860)
Zeal without direction can be due to excessive emotional or ideological or childhood issues. That's where some inner exorcisms are required to cleanse our inner world of many demons that direct our paths and ways and styles. To have the right authority directed by the Lord and his word, one has to constantly check one's motives for action or preaching.
Jesus spoke and acted with authority: St. Claire had developed the meaning of authority as authoring life, giving birth, or empowering people to bring forth. For her authority was always for service. When we say s/he is an authority on that subject, we mean to say that person has explored, researched, understood the matter in such a way s/he can talk about teach about it as if the matter has become his/her own.