I've never heard that before....very profound.
When Israel could not see:
Genesis 48:8-11
8 And Israel beheld Joseph's sons, and said, Who are these?
9 And Joseph said unto his father, They are my sons, whom God hath given me in this place. And he said, Bring them, I pray thee, unto me, and I will bless them.
10 Now the eyes of Israel were dim for age, so that he could not see. And he brought them near unto him; and he kissed them, and embraced them.
11 And Israel said unto Joseph, I had not thought to see thy face: and, lo, God hath shewed me also thy seed.
>>>18-20
18 And Joseph said unto his father, Not so, my father: for this is the firstborn; put thy right hand upon his head.
19 And his father refused, and said, I know it, my son, I know it: he also shall become a people, and he also shall be great: but truly his younger brother shall be greater than he, and his seed shall become a multitude of nations [melo hagoyim].
20 And he blessed them that day, saying, In thee shall Israel bless, saying, God make thee as Ephraim and as Manasseh: and he set Ephraim before Manasseh.
Blindness in part is happened to Israel, until Ephraim comes on the scene. Ezekiel 37.
Ephraim means "double fruitfulness";"double ash-heap";
O beautiful for spacious skies,
For amber waves of grain,
For purple mountain majesties
Above the fruited plain!
America! America!
God shed his grace on thee
And crown thy good with brotherhood
From sea to shining sea!