So trusting and restful...

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There is an analogy to be drawn here: we, the saved in Christ, in His arms, protected, shielded by (blanket) His word...

The eternal God is thy refuge, 

and underneath are the everlasting arms: 

and he shall thrust out the enemy from before thee; 

and shall say, Destroy them.

Deuteronomy  33:27 (King James Bible)

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