Allah is a forgiving and merciful God, who will accept the repentance of those who do evil in ignorance and quickly repent. The true believers, as mentioned in the Quran, are those who remember Allah and ask forgiveness for their bad actions and do not persist in insincerity. Allah knows what we divulge and what we conceal, and He will call us to account for our insincerities. Those who are arrogant, disdaining warnings and refusing to change their behavior, may be cursed and have their comprehension closed down.
The Qur'an reminds us of people who, when in distress, make their religion sincerely His and sincerely seek His help. Through this we can see that we have the power to be sincere even before we experience torment. Allah can bring down torment in the form of spiritual, material, and physical suffering for those who practice insincerity. To be on Allah's good side, people should refer to their consciences and heed warnings to be sincere. People should use the time they are given wisely and not be deceived by it, as Allah can punish them at any moment.
To avoid Allah's wrath, people should strengthen their faith and morality, and reconsider verses from the Qur'an to ensure sincerity in their lives.