William Blake's "Auguries of Innocence"

1.  What does the stanza mean?  2.  How does Blake use a literary device to convey that meaning?

The wild deer, wand'ring here and there,
Keeps the human soul from care.
The lamb misus'd breeds public strife,
And yet forgives the butcher's knife.

Perhaps Blake is using the wild deer to represent us human beings and we are keeping the human soul from care. We are straying the human soul away from innocence.

He uses the lamb as a symbol for Jesus/innocence/gentleness. The "misused lamb" creates public conflict. He is killed/sacrificed or butchered and forgives us for killing him. He forgives our sins.

A skylark wounded in the wing,
A cherubim does cease to sing.
The game-cock clipt and arm'd for fight
Does the rising sun affright.

I'm not sure about the first half of this one. A skylark is known for its song and a cherubim is an angel-like being or a winged creature who supports God. Maybe the skylark is seen as a supporter or creature of God and when it is wounded it no longer sings it's angel-like song. 

"The game-cock clipt and arm'd for fight" 

In this he uses the vicious inhumanity of cock-fighting to symbolize war. The cock is the soldier who is clipt(head shaven) and armed for war. 

The rise of a new day of war is frightening to the soldier. 

Augurs are soothsayers/prophets.

Auguries are practices of an augur. 

Blake uses symbolism to show that we are not prophets of innocence at all.