The average believer would never consider the word joy to be an appropriate descriptive term for temptations. There is a great explanation for this as the average believer experiences little to no victory when tempted. Temptations put a man’s faith on trial. When his faith stands the test, he learns patience. Therefore, he sees temptation as a means by which he can grow in the Lord and add virtues such as patience. It is not that he finds joy in the temptation itself, but that God can and will use that temptation to make him "perfect and entire, wanting nothing" (James 1:4). Believers who fight through and obtain victory find joy in knowing that their faith pleases God (Hebrews 11:6).
Discerning the difference between the workings of God and the mischief of Satan sometimes serves as a difficult task for believers. Although the Devil is called the tempter in Matthew 4:3 and 1 Thessalonians 3:5, the Bible also shows that God uses temptation to try a man (Genesis 22:1). Other than the association to instigating temptation, God and Satan have no other common ground in this matter. The Devil’s motive and method of temptation is simply wicked. On the other hand, the Lord tempts only for the sake of trying one’s faith to bring about a righteous outcome. Do not discount the fact that God never tempted anyone with evil (James 1:13).
Self-examination serves as a tool for man to use to find out who and what he is. Though some preachers suggest that believers should never question their own salvation experience, the scripture encourages self-examination. If there are doubts, believers should certainly ask questions concerning the basis for their salvation. Was it based upon one’s feelings or solely upon the scriptures? They should ask what they did in order to be saved. Did they join a church, do some penitent work, or did they call upon the name of the Lord Jesus Christ by faith as dictated by the scriptures? They should ask about the effects of their salvation. Have they seen a change of heart, or are they the same that they were before trusting Christ as Saviour?