Not all offenses are in the field of youth sins as some may think.
There are offenses in the field of religion as in the case of heretics and those who spread suspicions concerning religion or spread atheism or deny the resurrection and miracles of Christ.
There are also offenses in the field of philosophy and ideology where principles and values are shaken. This is the case of the heretics who introduce new ideas to destroy the established ideas under the name of science and innovation.
The Arians were more dangerous than Arius himself and they offended Athanasius more. So, it is well said by St. James the Apostle, "My brethren, let not many of you
But, what is the reason? "For we all stumble in many things". It is the stumbling block of teaching, when one stumbles by himself, seeing himself right, wise in his own eyes (Prov. 3:7).
Moreover he makes others stumble through spreading his wrong teaching.
Do not, then, accept every new thought that destroys what you have previously received.
Such thoughts may be a stumbling block for you, for some would try to present something new by abolishing old traditions to prove themselves more knowledgeable .
Some of those work in Biblical criticism. They are clergymen and professors of Theology in foreign universities. However they are stumbling blocks and according to the words of the Apostle "they shall receive a stricter judgment," being condemned for their errors and for spreading such errors.