Hazrat Mirza Ghulam Ahmad, the Promised Messiah & Mahdi (as) says:
There are three stages of knowledge: knowledge by inference, certainty by sight and true certainty. For example, to believe in the existence of a fire somewhere at the sight of smoke is knowledge by inference. However, to see the fire with one’s eyes is certainty by sight. After this, there is true certainty, which is akin to putting one’s hand into the fire and to know for certain that the fire exists by experiencing its heat and burning sensation. How unfortunate is the one who has attained neither one of these stages. According to the following verse, a person who is deprived of Allah’s grace is entangled in the practice of blindly following others. Allah the Exalted states: “And as for those who strive in Our path — We will surely guide them in Our ways.” 29:70
Meaning, a person who strives in our cause shall be shown the ways that lead to Us. Along with this promise, we have also been taught the prayer: “Guide us in the right path.” (1:6)
Therefore, man ought to keep this in mind and supplicate fervently in their formal Prayer, lest he departs from this world blind and bereft of insight. Allah Almighty states: “But whoso is blind in this world will be blind in the Hereafter.” (17:73)
Meaning, whoso is blind in this world shall be blind in the hereafter. This demonstrates that we must take our ability to see from this very world, so that we may be able to witness the hereafter. In order to experience the next life, our senses are to be developed in this very world. Can it be conceived that Allah the Exalted would make a promise and then break it?
Who is blind?
A blind person is one who is bereft of spiritual insight and pleasure. A person who blindly follows the practices of their family just because they are born into a Muslim household is called a Muslim. Similarly, a person who is born to a Christian family becomes a Christian. This is the very reason that such people give no regard to God, the Messenger or the Quran. Even the love such people possess for religion is questionable. Some remain in the company of those who act insolently towards God and His Messenger. This is wholly due to the fact that such people do not possess a spiritual eye. They are empty of love for religion. Does a person who is full of love desire anything that is at odds with the liking of their beloved? Hence, Allah the Almighty teaches that He is prepared to bestow His bounties if a person is prepared to receive them. The offering of this supplication prepares one to receive divine guidance. (Malfuzat, vol. 1, p. 18-19) – Reading in Maltese