The Devils Deception by Imam Ibn AL-Jawzi

Chapter Seven: Devil's Deception ef the Scholars (al- 'uldma')
Iblis may deceive a good preacher to make him feel that he is not
worthy of preaching, causing him to stop preaching. This discontinues
the good that this man was doing. Iblis tells this man that he is
showing off because of the pleasure he finds from preaching, and
that quitting is safer for him.
[ 7:5 ]
The Devil's Deception of Linguists (ahlu'l-Lughah)
and Scholars of Literature (al-Adah)
Iblis has deceived most of them by occupying them with the science
of grammar and linguistics to the point of neglecting performing
religious obligations, such as knowing what they need to know
about religious rituals, proper etiquettes, what rectifies the heart.
They also do not pay attention to sciences that are better than linguistics,
such as tafsir, badith and ftqh. They spend their entire lives in
sciences that are not sought for (in and of) themselves. Some of
them do not know much of the requirements of religion orftqh, and
do not worry about purifying their soul and heart.
In spite of all of this, they are very arrogant. Iblis convinced them
that they are the greatest scholars of Islam because Arabic language
and grammar are the way to understanding the noble Qur'an.
This is true, but all that is truly needed is that which is necessary to
pronounce (and understand) the Qur'an and Sunnah properly. Anything
other than that is not required.
Had life been long enough to acquire all knowledge, this would
have been fine, but life is too short so we must put ahead that which
is better and more important.
219