If we are left on our own, we will separate from our Lord and Saviour because the intrinsic nature of our flesh continually leads us away from God and His kingdom. It is the Holy Spirit that keeps us in VITAL CONTACT with Christ. Without the Holy Spirit, you cannot continue in the divine life that you received at salvation.
In fact, the fruits of salvation are the proofs that you are born again and that can only be seen when you remain in vital contact with Jesus. As you stay in fellowship with the Holy Ghost, He brings you into fellowship with Jesus and the nature of sin that you received from Adam is swallowed up and is daily replaced by the supernatural life of Christ. Fellowship with the Holy Spirit reflects in all ramifications of your life. It is your fellowship with the Holy Spirit that makes your spirit man react against the things that unbelievers enjoy doing. As you remain in vital contact with the Holy Ghost, He purges your internal desires, your enjoyment and your entertainment. Unbelievers may celebrate with alcoholic drinks but we celebrate by praising the name of the Lord which they cannot understand. The content and substance of a believer’s celebration should be different but carnal Christians still revert to the life of sin in their celebrations because they are not in vital contact with the Holy Spirit.
Only Christians can be truly joyous because joy is a function of what you know while happiness is a function of happenings around you. The joy of the Lord is your strength as a believer and a Christian in vital contact with the head of the church cannot be fed up of life as the Holy Ghost brings him into vital relationship with Christ.