How can we tell when we are "abiding in Christ"?

...Is there a special feeling? No, but there are special evidences that appear and they are unmistakably clear. For one thing, when you are abiding in Christ, you produce fruit.

John 15:2 Every branch in me that beareth not fruit he taketh away: and every branch that beareth fruit, he purgeth it that it may bring forth more fruit.

Also, you experience the Father's "pruning" so that you will bear more fruit. The believer who is abiding in Christ has his prayers answered.

John 15:7 If ye abide in me and my words abide in you, ye shall ask what ye will and it shall be done unto you. 

You will experience a deepening love for Christ and for other believers. You also experience joy. 

Abiding in Christ demands worship, meditation on God's Word, prayer, sacrifice, and service -- but what a joyful experience it is! Once you have begun to cultivate this deeper communion with Christ, you have no desire to return to the shallow life of the careless Christian.