If you abide in me, and my words abide in you, ask whatever you wish, and it will be done for you.
By this my Father is glorified, that you bear much fruit and so prove to be my disciples. [John 15:7-8]
Why does Jesus go from talking about answered prayer to God-glorifying fruit-bearing? How does verse 7 relate to verse 8?
Verse 16 connects the two subjects more explicitly:
You did not choose me, but I chose you and appointed you that you should go and bear fruit and that your fruit should abide, so that whatever you ask the Father in my name, he may give it to you. [John 15:16]
Jesus chose and appointed his disciples for the purpose that they would go live out fruitful obedience (i.e., God-glorifying works; see verse 8 and Matthew 5:16). Then he continues, “so that …” Is the clause a further purpose? In other words, did he choose his disciples to bear lasting fruit in order for their requests in his name to be granted?
That is unlikely, since it would imply that good works (i.e., bearing fruit) must be performed before prayer can be answered. Such would be contrary to Scriptures that show good works as an end, not a means (or a means only to glorifying God, e.g., Ephesians 2:8-10; 1 Peter 2:12).
It seems rather that the “so that” is a repeat of the earlier “that.” In other words, Jesus chose and appointed his disciples so that they would bear fruit, that is, so that their requests in his name would be granted.
Thus, fruit-bearing consists in asking requests in Jesus’ name. This is also confirmed by the fact that bearing fruit is what glorifies the Father (John 15:8) and asking and receiving in Jesus name is what glorifies the Father (John 14:13).
And what does that look like, for fruitful obedience to be the asking and receiving of requests in Jesus’ name? I think it probably looks like living out life in pursuit of God’s glory and praying for satisfaction in that pursuit and making supplications whenever you encounter obstacles. I offer an example to close:
Say my heart breaks for a local refugee population. I ask the Lord what I can do to be involved in seeing them relieved of their suffering and finding that lasting satisfaction I’ve found in Jesus. Soon, an idea comes to mind of starting an orientation and English-teaching ministry for disoriented newcomers. Praise the Lord for an idea. I continue praying for blessing as I run with it. I raise money and purchase a building through the support of the government’s refugee funds. Then the government retracts their support, as they realize they cannot legally support my vision. I’m now stuck with a building’s mortgage beyond my means, and a lack of ability to carry out the vision. I cry out for help in Jesus’ name. He brings other believers to support the ministry. Many believers glorify God as they hear the story. And then one day, refugees themselves comes to experience the same promises. And all this “that the Father may be glorified in the Son” (John 14:13).