Hawzah News Agency - Ali ibn Muhammad has narrated from Ahmad ibn Muhammad ibn Khalid from his father from one of our people that Abu ‘Abdillah (al-Sadiq) :

لَيْسَ بَيْنَ الايمَانِ وَالْكُفْرِ إِلا قِلَّةُ الْعَقْلِ قِيلَ وَكَيْفَ ذَاكَ يَا ابْنَ رَسُولِ الله قَالَ إِنَّ الْعَبْدَ يَرْفَعُ رَغْبَتَهُ إِلَى مَخْلُوقٍ فَلَوْ أَخْلَصَ نِيَّتَهُ لله لاتَاهُ الَّذِي يُرِيدُ فِي أَسْرَعَ مِنْ ذَلِكَ.

“There is nothing (or no difference) between belief and disbelief, but lack of intelligence." So he asked him, “How is that so oh son of Rasulullah ﷺ?”. He replied, "Indeed, when a servant raises his desire to a creation, if he had sincerely intended it for Allah, the one he seeks would respond even faster than that."

Al-Kāfi, v.1