(2.) Positively: But deliver us from evil; apo tou ponerou--from the evil one, the devil, the tempter; "keep us, that either we may not be assaulted by him, or we may not be overcome by those assaults:" Or from the evil thing, sin, the worst of evils; an evil, an only evil; that evil thing which God hates, and which Satan tempts men to and destroys them by. "Lord, deliver us from the evil of the world, the corruption that is in the world through lust; from the evil of every condition in the world; from the evil of death; from the sting of death, which is sin: deliver us from ourselves, from our own evil hearts: deliver us from evil men, that they may not be a snare to us, nor we a prey to them."
Source: Matthew Henry's Commentary on the Whole Bible Volume V (Matthew to John)
But deliver us from evil] APOTOUPONHROU, from the wicked one.
Satan is expressly called OPONHROS, the wicked one.
Mt 13:19, 38, compare with Mr 4:15; Lu 8:12. This epithet of
Satan comes from PONOS, labour, sorrow, misery, because of the
drudgery which is found in the way of sin, the sorrow that
accompanies the commission of it, and the misery which is entailed
upon it, and in which it ends.
It is said in the MISHNA, Tit. Beracoth, that Rabbi Judah was
wont to pray thus: "Let it be thy good pleasure to deliver us from
impudent men, and from impudence: from an evil man and an evil
chance; from an evil affection, an evil companion, and an evil
neighbour: from Satan the destroyer, from a hard judgment, and a
hard adversary." See Lightfoot.
Deliver us] RUSAIHMAS-a very expressive word-break our chains,
and loose our bands-snatch, pluck us from the evil, and its
Source: Adam Clarke's Commentary on the Bible
Deliver us from evil. The original, in this place, has the article-- deliver us from THE evil--that is, as has been supposed, the evil one, or Satan. He is elsewhere called, by way of eminence, the evil one, Mt 13:19, 1Jn 2:13, 14, 3:12. Deliver us from his power, his snares, his arts, his temptations. He is supposed to be the great parent of evil, and to be delivered from him is to be safe. Or it may mean, deliver us from the various evils and trials which beset us, the heavy and oppressive calamities into which we are continually liable to fall.
Source: Barnes' New Testament Notes