How can we mend our inner selves or our secret thoughts?

The rectification of inner thoughts and intentions is achieved by being mindful of Allah and rectifying one's aims and intentions, by feeling Allah’s gaze upon His servant in all states, for Allah is Watchful over everything. Among the greatest things that rectify the inner self is repelling self-centered thoughts and satanic whispers, for thoughts are the origin of every action, and their soundness leads to the soundness of all subsequent levels. The method of safeguarding thoughts includes firm knowledge of Allah’s awareness of the heart, modesty before Him, veneration of Him, fear of Him, preferring Him, fearing the emergence of evil, and knowing that bad thoughts are like bait in a trap, and that they do not coexist with thoughts of faith, and that they are a boundless ocean of imagination, and a valley of fools. Among the greatest reasons for repelling bad thoughts is frequent recitation of the Quran with humility and contemplation, which allows the meanings of the Quran to dominate one's intellect and heart.