True to the Faith in all of its amplitude

I'm reading Thomas Howard's book Evangelical Is Not Enough right now. It is simply excellent. I have shared quotations from it before, and here is another quote about doing justice to the fullness of the faith.

"...the Reformation has a lively sense of how prone we all are to magic and idolatry. We mortals would much rather bob at the cross than embrace its truth in our hearts. To light candles is much easier for us than to be consumed with the self-giving fire of charity so effectively symbolized by those candles. We lavish respect on the altar at the front of the church and neglect the sacrifice of a pure heart. Evangelicalism presses home these observations, quite rightly.

But it is one thing to see dangers; it is another to be true to the Faith in all of its amplitude. By avoiding the dangers of magic and idolatry on the one hand, evangelicalism runs itself very near the shoals of Manichaeanism on the other – the view, that is, that pits the spiritual against the physical. Its bare spare churches, devoid of most Christian symbolism...be speak its correct attempt to keep the locale of faith where it must ultimately be, in the heart of man. But by denying the whole realm of Christian life and practice the principle that it allows in all the other realms of life, namely, the principle of symbolism and ceremony and imagery, it has, despite its loyalty to orthodox doctrine, managed to give a semi-Manichaean hue to the faith... "