And the second kind is never devoid of one of two possibilities: either the truth is fixed in it, never departing because of its strength joined to softness, or its softness is coupled with weakness and disintegration. The latter is the heart that is ill, whereas the former is the strong yet supple heart.
The heart, in fact, is like the limbs of the body. Take the hand, for instance: it may be stiff and dry, unable to bend or to grasp—or it may grasp only with violence; that is the likeness of the hard heart. Or it may be weak, diseased, and incapable on account of its frailty and sickness; that is the likeness of the heart afflicted with disease. Or it may grasp with both power and gentleness; that is the likeness of the heart that is knowledgeable and compassionate. By compassion it is freed from hardness, and by knowledge it is freed from illness, for the illness arises from doubts and deceptive ambiguities. Hence those who escape these two defects are described as possessing knowledge, faith, and humble submission.
His words, “so that those who have been granted knowledge may know that it is the truth from your Lord, and therefore believe in it, and their hearts humble themselves to it” ⦗Q 22:54⦘, prove that knowledge leads to faith; the people of knowledge have not, as a group of speculative theologians imagine, risen above the rank of faith. Rather, they combine knowledge and faith, as the Exalted says, “Yet those of them who are firmly grounded in knowledge, and the believers, believe in what has been revealed to you and what was revealed before you” ⦗Q 4:162⦘, and as He says, “Those who were given knowledge and faith will say, ‘You remained according to Allah’s decree…’ ” ⦗Q 30:56⦘.
In the same vein is His saying, “But those who are firmly grounded in knowledge say, ‘We believe in it; all of it is from our Lord’ ” ⦗Q 3:7⦘. Here He tells us that those endowed with knowledge recognize it as the truth from their Lord, while there He tells us that, when confronted with what is ambiguous, they declare, “We believe in it; all of it is from our Lord.”