Don't trust in yourself. We are all weak, we may fall, if we expose ourselve to false teachings.
There was a man who wanted to read a heretical book in order to write sth against it. He red it and lost his faith.
from catechism in examples.
It is an illusion to seek the company of sinners on the pretence of reforming them or of converting them; it is far more to be feared that they will spread their poison to us. St. Gregory nαzιanzen