As a biblical scholar Singgih is quite keen on the difference of approach between the more philosophical and the scriptural analysis in the book. The variations in the Gospel of John (where Jesus declares himself united/one with the Father, but different and even obedient in other places) are not seen in the dogmatic doctrines.
Singgih mentions that Vorgrimler quotes a ban on the icon of Rublev by the Vatican in 1750: it should lay emphasis too much on the inter-Trinity debates and relations that are basically unknown to us.
Singgih himself mentions that in Taizé the Rublev icon was very popular. He pleads for a postmodern tolerance: because we do not know much about the inner life of the Trinity, we should realize that Christians in Indonesia live in a country where Muslims are quite sensitive and even negative about Trinity-talk, but among Christians a greater variety of opinions in this respect should be tolerated: not one precise doctrine, but rather many devotions, such as people like it.