Is it necessary to pronounce the Two Testimonies (Shahadatayn) with the intention of entering Islam for a person to be considered Muslim, if they were raised in an Islamic environment, believed in the Quran and Prophet Muhammad (peace be upon him), and then gradually committed to prayer and fasting?

One's Islam is not established merely by believing in the Quran or in the message of the Prophet, peace and blessings be upon him, without uttering the two testimonies (Shahadatayn) or performing the prayer. If a disbeliever prays, he is judged outwardly as a Muslim, and the apparent rulings of Muslims apply to him. If he dies immediately after the prayer, he is washed, prayed over, and buried in Muslim cemeteries. This is based on the opinion of many scholars, due to the Prophet's saying, "Whoever prays our prayer and faces our Qiblah, that is the Muslim for whom Allah's covenant is due." However, to be truly Muslim, one must utter the two testimonies with belief in them and act according to their implications. If he utters the two testimonies falsely, or is too arrogant to submit to Allah's law, his utterance will not benefit him, and he will not truly enter Islam.