The focus of the abiding Christian is to bear fruit—that is, to bring forth in his life all the good things of God. Thus, when he abides, in his spirit (or in his attitude) he is filled with the fruit of the Spirit, which is “love, joy, peace, longsuffering, kindness, goodness, faithfulness, gentleness, [and] self-control” (Gal. 5:22). Likewise, when he abides, in his behavior he does what is righteous to the praise of God (Phil. 1:11; Heb. 13:15).
Fruit is also new converts. Therefore, the abiding Christian will naturally share his faith with others, and those whom he leads to faith in God will be the evident fruit (Rom. 1:13).
The reason why the abiding Christian focuses on bearing fruit, and why we all should focus on bearing fruit is because that is what God has appointed us for. He has said to us in John 15:16, “You did not choose Me, but I chose you and appointed you that you should go and bear fruit, and that your fruit should remain…”
The abiding believer has this verse implanted in his heart. Therefore, he makes it his goal to win others to Christ and to disciple them. In order to accomplish that end, he loves them, is burdened for them, and prays for them constantly. And because he puts forth an effort to do these things so that fruit is produced, his prayers are answered according to the promise at the tail end of John 15:16, “…that whatever you ask the Father in My name he may give you.”
And why is this so? Why will God hear our prayers just because we have the focus of bearing fruit? Well, I think it is because, He knows we love Him and He trusts us. For the one who loves God and is busy with his work has His desires and goals; thus every request of his will be for the good of His kingdom, and therefore granted.