How can a Muslim overcome internal obstacles to implementing commands and avoiding prohibitions so as to become one of the pious, knowing that his psyche objects to divine commands due to not knowing their علت (underlying reason), despite his realization of the importance of piety in the Quran and Sunnah?

We ask Allah to grant you success and guidance, and we advise you not to frequently raise objections and problematic issues, as this is an incorrect method for seeking religious knowledge. Indeed, Shaykh al-Islam Ibn Taymiyyah advised his student Ibn al-Qayyim not to make his heart like a sponge that absorbs every doubt, but rather to make it like solid glass through which doubts pass over its surface without settling within it.

Know that piety (taqwa (definition)) and guidance are attained through action. Your preoccupation with raising objections might be a psychological ploy to avoid action and compliance. Attaining piety does not require scholarly investigations as much as it requires sincere will and determination in action and striving against one's self. Allah Almighty says: "And those who strive for Us – We will surely guide them to Our ways. And indeed, Allah is with the doers of good." (Quran 29:69). We apologize for not answering your remaining questions, as we only answer one question per message.