Some believers have good morals, some are lacking, this is based on their ability to observe, and practice their religious teachings. Imam Al-Ghazali in his work entitled Asnaf al-Magrurin explained that believers who are deceived are people who always stand by Allah's forgiveness (His mercy) but do not want to do good deeds or do good. It starts from within him who feels that his parents have done good, so it is enough to benefit his children.
The main factor that makes believers deceived comes from the whispers of Satan who teaches people that who loves someone then he will love his children too. Likewise God will love someone and his children. A whisper like this is what makes a person not want to carry out obedience because they already feel represented by their parents. This event is like a story experienced by the son of Noah named Kan'an. He felt as a child of a Prophet who had closeness to God.
The above reality is a description of the person who thinks he will be saved due to his parents' piety, so that he is likened to someone who thinks he will become full, even though he eats his parents.  The solution is that as a believer must maximize himself in charity. This is in accordance with the Hadith which reads:
عن أبي يعلي شداد بن أوس قال قال رسول الله صلى الله عليه و سلم: الكيس من دان نفسه وعمل لما بعد الموت والعاجز من أتبع نفسه هواها ثم تمنى على الله
means: narrated from Abi Ya'la Shaddad bin Aus said, Rasullah said, “The person who is smart in his mind is a person who wants to correct his deficiencies and prepare supplies after death to pick him up. While people who are weak in reason are those who always follow their passions and always hope (wishful thinking) to Allah with something that cannot happen. ”(HR: Tirmidhi)
Imam Munawi in the book Faidhul al-Qadir explained that the purpose of this hadith is that intelligent people are people who always hope (الراجي) and are supported by maximum effort, such as someone who hopes to produce a lot of harvest after he goes through the process of planting, caring for him, so he always hopes to be success. It is different with the empty hope (Tamanni) without being based on effort, then this will be in vain.
The conclusion is that a believer is not deceived so he must do as much charity, without boasting the practice of his parents or ancestors, because it will not benefit himself.