Here is a great comment by theologian Graeme Goldsworthy:
All the fruits of the gospel are just that: fruits of the gospel. Regeneration, faith, sanctification, and final perseverance are all fruits of the gospel. They can grow on no other tree. Legalistic demands, cajolery, and brow-beatings for ‘deeper commitment’ and ‘total surrender’, when cut loose from the grace of the gospel are but wretched weeds which can produce only despondency, disillusionment and rebelliousness.
This is essentially what Jesus means when he says, “Whoever abides in me and I in him, he it is that bears much fruit, for apart from me you can do nothing” (John 15:5). The Christian life is rooted in the good news of being united to the crucified and risen Redeemer.