Underneath are the everlasting arms." - Deuteronomy 33:27
A few thoughts from "Prince of Preachers", Charles Haddon Spurgeon:
God surrounds his children on all sides: they dwell in him. The passage before us shows that the Lord is above, for we read, 'There is none like unto the God of Jeshurun, who rideth upon the heaven in thy help, and in his excellency on the sky.' Assuredly he is around them, for 'The eternal God is thy refuge;' and he is before them, for 'He shall thrust out the enemy from before thee; and shall say, Destroy them.' Here according to the text the Lord is also under his saints, for 'Underneath are the everlasting arms.' 'Lord, thou hast been our dwelling-place in all generations,' and by thee we are everywhere surrounded as the earth by the atmosphere.
'Within Thy circling power I stand;
On every side I find thy hand;
Awake, asleep, at home, abroad,
I am surrounded still with God.'