Many things have been taught as truth when they were not in actuality truth. For many years people believed that the world was flat, but it was not. Even though most of the people in the world believed that the world was flat, it did not make it true and it did not make it so. The world was still round. So we see, even though the majority believe something and they are sincere about it, it is not necessarily the truth.
Some people don t like the truth.
A man went to the doctor and the doctor told him that he had cancer. Without hearing the truth the cancer would have just worked away until it finally killed the man. After he heard the truth, he then was aware of his awful need, and had an operation to remove the cancer. Now let us look at the truth about God and Heaven. Most people have different ideas about these subjects.