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).
If ever there was a man in the early church that qualified as a watchman, it would have been the apostle Paul. Paul includes “in watchings often” in his testimony about the trials he endured. He also mentioned that these watchings approved him as a minister of God (2 Corinthians 6:4-5). We know from the biblical accounts that when many believers were unaware of danger, the apostle Paul stood upon the tower and sounded the trumpet of alarm. While others were spiritually sleeping, the apostle Paul was sober and alert to the needs of the church. No doubt Paul endured sleepless nights, fasted, and went without even the necessities of life because he was watching for the church.