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).
Any man desiring to know the motive of his sacrifices should consider the companions of his sacrifices. If a man offers a sacrifice followed by sorrow or regret, his motive was surely wrong. For instance, some people answer the call to give financially in a time of need. They sacrifice, but frustration accompanies their sacrifice because of the loss of money. This reaction should not and will not accompany godly sacrifice given with godly motives. One who sacrifices to the Lord from a godly motive will find joy and peace accompanying his sacrifice. When God works in an individual’s heart, encouraging a sacrifice, the heart rejoices at the opportunity to be obedient and declare one’s love for a holy God.