Once Prophet (Allah bless him and give him peace) read the verse of Holy Quran:

“So, whomsoever Allah wills to guide, He makes his heart wide open for Islam,….”

[Surah- An’aam : [6:125]

Thereafter, Prophet (Allah bless him and give him peace) said: “When the Light of Islam enters a person’s heart, it opens up for it.”

Someone said: “O Prophet! Is there a sign which indicates this opening of the heart?”

Prophet (Allah bless him and give him peace) said:

‘The aversion of this pretentious worldly life,

the fondness of the everlasting life (Here-after) and

preparation before the coming of death.”‘

[Mishkaat] Maut ki Yaad Hazrat Shaikhul Hadith ra