Only time will 'heal the rift/breach' between the two families. [=make the two families become friendly again]
The tree sap is believed to have 'healing' powers.
After the divorce, he needed some time to 'heal'.
(..) Barnes. JOHN: The devil's hands have been busy. What is it? It's real flesh and blood, though it seems to heal itself quickly. The heart is human and very powerful. The brain, too, but with a chip interface. MARCUS: What have you done to me? (..)2009 Terminator Salvation