Professor Ansarian:
Embracing Islam is easy and being pious can also happen in a simple and easy way. For example one can enter the realm of Islam by The Declaration of Faith (Shahadah) but keeping your religion and being religious have been difficult in all ages and times. In the meantime, the poisonous and anti-religious propaganda by the enemies of this right religion which is Islam have always betrayed the weak Muslim people. Nowadays, the children of some religious people travel abroad to study but some of them after living for a couple of years there return to the Islamic society with loose and contaminated thoughts and beliefs. And this issue is due to being exposed to the poisonous doubts as well as interacting with the infidels.
source : erfan.ir
