Joseph's brothers sold him into slavery. Joseph was transported to a foreign country and there spent time in prison. Yet, he was able to survive those difficulties and even rose to prominence and security. When faced with his brothers, themselves in need, he offered them kindness.
The lectionary response to this Genesis passage, Psalm 133, calls for family unity by describing what that unity is like.
Let's read this psalm as extolling harmony in a family as applying literally to a biological family but not restrict our reading to that application. Let us consider what benefits derive from unity in each organization we humans are part of.
When we (family, church congregation, neighborhood) are at peace with each other, blessings are available and possible. When we don't have to use resources for peace-keeping, they are then available for enjoyment. Those blessings extend great distances--both literally and metaphorically. And they support our life.