What should a committed girl do when she starts questioning matters of faith, such as the purpose of creation, the truth of the Islamic religion compared to Christianity, how to discern what is right, and why don't all people embrace Islam?

Allah created creation for a wisdom, which is His worship and knowledge of His names and attributes, and to test people to show who performs best in deeds and who performs worst, so they divide into two groups: in Paradise or in Hellfire. The increase in the number of followers of a certain religion does not mean it is the truth, for truth is not known by multitude, and most people follow their whims. To recognize the truth, one must seek Allah's help, acquire knowledge, reflect, and turn to the Noble Quran. A Muslim must be cautious of associating with people of doubt and suspicion if he is not firmly grounded in knowledge. Human intellect is limited and cannot encompass Allah's wisdom in His creation and command.