The foot, as in Deuteronomy 33:3, signifies an inferior principle. To set the right foot on the sea and the left on the earth, as in Revelation 10:2, signifies that the Lord has the universal church under His intuition and dominion.

(Odkazy: Apocalypse Explained 10 [2]; Arcana Coelestia 2714)

'Service' denotes everything beneath, which is subordinate and obeys, and so, truth being derived from good, and ministering to good.

(Odkazy: Arcana Coelestia 3409, Genesis 26:14)