From the Qur'an...
From the Qur'an: “And if thou obey most of the inhabitants of the earth, they will mislead thee far from the way of God: They follow naught but an opinion, and they do but guess.” 6:116 Inherited religious principles should be examined. Islam advises every adult to examine the religion which he inherited. Inherited religion, like any other religion, is subject to proof. One may rely on the judgement of his parents as long as he is a child and not capable of making his own decisions.
When he becomes an adult, his religion becomes his own responsibility. Respect and honor towards parents is one of the Islamic commandments, but that does not mean accepting their opinions in important matters such as religion when their opinion is wrong.
As a matter of fact, when parents adhere to a wrong religious principle and demand from their children to follow them, they should not be obeyed because such action would be contrary to the will of God; that is, if a person obeys his parents when they are wrong, he disobeys God. From the Holy Qur'an: “And we have enjoined on man concerning parents…. saying: 'Give thanks to Me and to thy parents. To Me is the eventual coming.
And if they strive with thee to make thee associate with Me that of which thou hast no knowledge, obey them not, and keep kindly company with them in this world. ' ” 31:14-15 Islam commands the individual to examine its own teaching as well as any other teaching. By doing so, one may be able to value Islam more than ever before. Doubters are not excused. When a person is not committed to any religion and doubts the whole religious concept, he should not be satisfied with his doubt.
It is his duty to protect himself and his vital interests in this world from any harm and damage. Similarly, he has the same responsibility and duty in protecting his spiritual interest from being damaged. His serious inquiry about what may have a bearing on his spiritual life is as important as his inquiry about what may have a bearing on his physical life.
In order for a person to carry out his responsibility and to fulfill his obligation, it is necessary for him to inquire, and inquire seriously, about his religious doubts. There may be many accessible facts in the doubted area; therefore, he has to try to find them. When he conducts his research and exhausts all his means and fails to find the truth, he would be excused in the eyes of God. God asks the individual only to do what is possible for him to do.