Jesus wants each of us to know the same joy that He knew because of His relationship with the Father. Because of the Holy Spirit, we have access to that same joy. Happiness is temporary and fleeting but the joy that we have is a fruit of the Spirit. Since the Spirit never leaves us, we always have access to that joy.
22 But the Spirit produces the fruit of love, joy, peace, patience, kindness, goodness, faithfulness–Gal. 5:22 (NCV)
We also have access to the same love and the same knowledge. As we learn to love Jesus, obedience becomes an act of adoration and not an act of obligation. One of the results of loving Jesus is that we will also love those around us and it will be easy to show them that we love them thus making it easier to obey the command that we should love each other. The Holy Spirit produces love and joy all the time. The question for us is this: If we are not full of love and joy, why not? Maybe we need to check our connection to the flow of the Spirit. Or as Zig Ziglar said (and I paraphrase here) We need a “checkup from the neck up to get rid of stinking thinking and replace it with an attitude of gratitude”.
“The Gospel has come to you because it’s on its way to someone else.” -Anonymous