There are sects of Christianity, even among the Orthodox denominations, that will influence their members to avoid reading anything but the Bible. Of course the Bible encourages just the opposite, but rather urges us to --

"To understand a proverb and a saying, the words of the wise and their riddles." Pr. 1:6

"One who walks with wise people will be wise, but a companion of fools will suffer harm." Pr. 13:20

To submit to one voice, even of a pastor, is what can lead to cultic like thinking.