I agree it is like a piece of delicious candy with a bit of poison. Much like the difference between a healthy apple or an apple grown by Monsanto's seed. Both probably taste pretty good, but one could take away our life and we not even know it. If we don't seek the truth of the matter, we will ingest whatever comes our way. The quality of food we ingest...many times is the quality our bodies become. Same way with spiritual things.
We have to find a trusted source for a healthy apple, just like we must seek and test a true source for spiritual truths.