Qur'anic verses or sentences dzikrullah read or heard over and over again will stabbing into the subconscious mind, embedded strong and form the character and personality according to the verse that reads it.
The verse will form the character of a devoted person, putting on a firm and strong faith of gentle heart, tawadhu away from the nature of ria, takabbur and arrogant.
The character will reject any negative whisper heard or whispered by the demons and jinns around him. He is unaffected by the various suggestions and negative whispers he hears.
His heart feels secure, comfortable and peaceful with the dhikr of calling and glorifying the name of God