Consider Colossians 1 – Paul speaks of their faith in Christ, love of the saints, the hope laid up for them in heaven which was heard in the gospel, which has come to them and brought forth fruit (specifically in them). He says they have known the grace of God in truth and that they have love in the Spirit. He exhorts them to knowledge, wisdom, and spiritual understanding, to walk worthy of the Lord, fruitful in every good work. Once again he speaks of them increasing in knowledge – as these concepts of work, fruit, and knowledge go together.