Passage
And Jesus answered and said unto them, For the hardness of your heart he wrote you this precept.
And Jesus answered and said unto them, For the hardness of your heart he wrote you this precept.
Mark 10:3 And he answered and said unto them, What did Moses command you?
Mark 10:4 And they said, Moses suffered to write a bill of divorcement, and to put her away.
Mark 10:5 And Jesus answered and said unto them, For the hardness of your heart he wrote you this precept.
Mark 10:6 But from the beginning of the creation God made them male and female.
Mark 10:7 For this cause shall a man leave his father and mother, and cleave to his wife;
The verse centers on "jesus", "answered", "said", "hardness", "heart", "wrote", and "precept". It is saying that the verse draws attention to "jesus" and "answered", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 4's "And they said Moses suffered to write..." into verse 6's "But from the beginning of the creation...", so "jesus" and "answered" belong inside that flow. In Mark context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "jesus" and "answered" with trust shaped by these words, not by a vague optimism outside the passage.