The sign of Immanuel . Reject the wrong and choose the right

Isaiah 7:10-25
Immanuel: God with us.
The Lord gave second sign to king Ahaz, but he rejected, it seems reasonable; I will not put the Lord to the test. It is Ahaz didn't trust in the Lord.
The second sign is "The virgin will be with child and will give birth to a son, and will call him Immanuel. He will eat curds and honey when he knows enough to reject the wrong and choose the right."
But before this child come the two kings- Rezin king of Aram and Pekah king of Israel will be laid waste.
The Lord will bring on you and your people and on the house of your father a time unlike any sine Ephraim broke away from Judah- he will bring the king of Assyria.
In that day 1)the Lord will bring the army from Egypt and from the land of Assyria to here. 2) The king of Assyria will shave your head and the hair of your legs and take off your beards also. 3) A man will keep alive a young cow and two goats, have curds and honey. 4)Every place where there were a thousand vines worth a thousand silver shekels, there will be only briers and thorns. Land of Judah and Israel will be ruined.
Why?
Ahaz, with false piety, will not ask for one. So Isaiah promises him another sign. a child called 'God with us'.
In the immediate future 'God with us' means judgment. though in the long term it will mean blessing.
The sign seems to have both present and future significance. 1) In the few years it takes for a child conceived now to reach an age when he can choose for himself, Israel and Damascus will cease to be a threat. 2) There will on day be born a child who will truly be 'Immanuel', 'God with us'. The word translated 'virgin' in some versions is more like English 'Maiden' than the technical term, 'virgin'.
Sign of Immanuel gave the faith to Isaiah's time, but it is also giving us the promise in this day.
He will have blessing when he knows enough to reject the wrong and choose the right. Do not have the desire of greedy!
How?
Do the right thing and reject the wrong, then 'God with us' has it's really blessing to me.