Get thee hence = Go! This is the end, and the Lord ends it. In Luk_4:13, after the third temptation, Satan "departed" of his own accord and only "for a season". Here, after the last, Satan is summarily dismissed, not to return. See App-116.
Satan = the Adversary. Septuagint for Hebrew. Satan.
Thou shalt, &c. Quoted from Deu_11:3, Deu_11:4. See App-107, and App-117.
only = alone, as in Mat_4:4. Quoted from Deu_6:13; where the possession of the earth (Mat_4:10) depends on loyalty to God (Mat_4:12), Who gives it (Mat_4:10); and on obedience to Him (verses: Mat_4:17, Mat_4:18).