Passage
What therefore God hath joined together, let no man put asunder.
What therefore God hath joined together, let no man put asunder.
Mark 10:7 For this cause, a man shall leave his father and mother and shall cleave to his wife.
Mark 10:8 And they two shall be in one flesh. Therefore now they are not two, but one flesh.
Mark 10:9 What therefore God hath joined together, let no man put asunder.
Mark 10:10 And in the house again his disciples asked him concerning the same thing.
Mark 10:11 And he saith to them: Whosoever shall put away his wife and marry another committeth adultery against her.
The verse centers on "therefore", "hath", "joined", "together", and "asunder". It is saying that the verse draws attention to "therefore" and "hath", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 8's "And they two shall be in one..." into verse 10's "And in the house again his disciples...", so "therefore" and "hath" 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 "therefore" and "hath" with trust shaped by these words, not by a vague optimism outside the passage.