In evangelical churches where limited Trinitarian thinking prevails, the Trinity is often a concept that people are keen to affirm (indeed many will recognize that not to do so would be to slip into heresy), and yet the riches that have been given to the Church in God’s Trinitarian self-revelation (for her own edification and for the salvation of the nations) are so often absent. A little Trinitarian language here and there passes for Trinitarian thinking and the result is a kind of theological caricature, which suggests the continued presence of one of Christianity’s foundational doctrines, while effectively ensuring its functional absence, and this has the potential to be every bit as dangerous as full-fledged heresy.
The church’s claim to union with God is an audacious claim, but, precisely because we have a Trinitarian God, it is a legitimate claim. Evangelical churches are settling for less whenever they substitute robust Trinitarian thinking and practice for various brands of limited Trinitarian thinking, which can only offer a limited and a less attractive gospel. That God sanctifies and saves is good news. That in Christ and by the Spirit we are invited to enter into the eternal fellowship that the Father, Son and Holy Spirit have enjoyed for eternity is very good news.