There is always something to rejoice about but we tend to rejoice in things like our new job, money, reputation, and power, but God would rather us rejoice in far better things.
Luke 10: 17-24
17 Then the seventy returned with joy, saying, “Lord, even the demons are subject to us in Your name.”
18 And He said to them, “I saw Satan fall like lightning from heaven. 19 Behold, I give you the authority to trample on serpents and scorpions, and over all the power of the enemy, and nothing shall by any means hurt you. 20 Nevertheless do not rejoice in this, that the spirits are subject to you, but rather rejoice because your names are written in heaven.”
21 In that hour Jesus rejoiced in the Spirit and said, “I thank You, Father, Lord of heaven and earth, that You have hidden these things from the wise and prudent and revealed them to babes. Even so, Father, for so it seemed good in Your sight. 22 All things have been delivered to Me by My Father, and no one knows who the Son is except the Father, and who the Father is except the Son, and the one to whom the Son wills to reveal Him.”
23 Then He turned to His disciples and said privately, “Blessed are the eyes which see the things you see; 24 for I tell you that many prophets and kings have desired to see what you see, and have not seen it, and to hear what you hear, and have not heard it.”