Luke 22:3

Verse 3. Then entered Satan into Judas. It is not necessary to suppose that Satan entered personally into the body of Judas, but only that he brought him under his influence; he filled his mind with an evil passion, and led him on to betray his Master. The particular passion of which Satan made use was avarice--probably the besetting sin of Judas. To show its exceeding evil and baseness, it is only necessary to say that when it produced its appropriate effect in this case, it led to the betraying and crucifixion of the Son of God. We may learn, also, that when Satan tempts men, he commonly does it by exciting and raising to the highest pitch their native passions.