Jesus only!

Jesus really did do it all. "By this my Father is glorified, that you bear much fruit and so prove to be my disciples." (Jn.15:8). Not, "by this my Father is glorified, that you keep lots of laws" - for Jesus is already our righteousness (1Cor.1:30). And when Jesus was asked, “What must we do, to be doing the works of God?” He answered them, “This is the work of God, that you believe in him whom he has sent.” (Jn.6:28-29). Bearing fruit is a result (almost a side effect, not something you aim for) of abiding in Jesus - "Whoever abides in me and I in him, he it is that bears much fruit, for apart from me you can do nothing." (Jn.15:5).

So focus on Jesus! Determine to know nothing and be identified by nothing except "Jesus Christ and him crucified." (1Cor.2:2). Do everything for Him - "Whatever you do, work heartily, as for the Lord and not for men, knowing that from the Lord you will receive the inheritance as your reward. You are serving the Lord Christ." (Col.3:23-24).