﴿ قُلْ هُوَ ٱلَّذِىٓ أَنشَأَكُمْ وَجَعَلَ لَكُمُ ٱلسَّمْعَ وَٱلْأَبْصَٰرَ وَٱلْأَفْـِٔدَةَ ۖ قَلِيلًۭا مَّا تَشْكُرُونَ ﴾

“SAY: "[God is] He who has brought you [all] into being, and has endowed you with hearing, and sight, and hearts: [yet] how seldom are you grateful!"”

Man has been granted the powers of hearing, seeing and thinking. Some individuals are so constituted that whatever they hear they follow, whatever they see they accept at face value, and whatever comes into their minds they uncritically retain. This type of person is like an animal which goes ahead with its head down, toeing a fixed line. Quite another type of person is one who investigates whatever he hears, who tries to understand more accurately whatever he sees, and who discovers the Truth by coming out of his personal shell. This second type of person is one who straightens himself up and walks on a straight path—the qualities of hearing, observation and sensitivity have been given to man so that he may recognise the truth and not be as ignorant or unaware as a blind or deaf person.