“Satan has a quiver full of poisoned arrows. Do you know which is the most deadly? It is trust, confidence in thyself; it is vain, self-confident, boastful spirit.” -Charles Ross, The Inner Sanctuary
“It was Satan who first by corrupted God’s word by addition, then by subtraction, and then finally by direct contradiction.” -Michael Horton
“How does Satan accuse us? By causing us to look at our sin rather than our Savior.” -Tim Keller
“Satan can make men dance upon the brink of hell as though they were on the verge of heaven.” -Charles Spurgeon
“Satan loves to fish in the troubled waters of a discontented heart.” -Thomas Watson
“Satan does not attempt an avowed destruction of the whole gospel, but taints its purity by introducing false and corrupt opinions.” -John Calvin
On Isaiah 1:14, and the ominous nature of God’s holy convocations becoming “Your new moons and Sabbaths,” Luther says, “Satan always wants to be God’s mimic and ape, but God hates him” (Luther, Works 16:17).
On Isaiah 1:18, “Christianity is surely a constant sobbing” (Luther, Works 16:20). I actually do not fully understand how this comment fits in with the verse or Luther’s surrounding comments, but it is still quite thought-provoking.