An Anglican Church which says that it is acceptable to depart from this God given pattern of behaviour (or any elements of it), either in teaching, or in practice, is too broad.
Someone might object at this point ‘but surely no one would reject the basic pattern of Christian conduct outlined in the catechism?’ Sadly, however, such as rejection has taken place, and is taking place, in those Anglican churches which are supportive of same-sex sexual relationships and the adoption of transgender identities.
This is because to keep our bodies in ‘temperance, soberness and chastity, ‘ as the catechism glosses the seventh commandment, involves accepting the bodies we have as gifts given to us by God and using them only in ways that are in accordance with God’s will (see Romans 13:13-14 and Colossians 3:5-8).
Adopting a transgender identity is incompatible with accepting the bodies we have as gifts given to us by God, because the bodies we have are either male or female[20] and thus give us a male or female sexual identity. To adopt a transgender identity is to reject this sexual identity, given to us in our bodies, as a gift from God. This is not to deny the reality of the distress caused by gender dysphoria, but it is to say that adopting a transgender identity is not a legitimate way to deal with this distress.
Being in a same-sex sexual relationship or a same-sex marriage is incompatible with using our bodies in accordance with the will of God, for the reasons helpfully summarised in the following quotation from J I Packer:
‘The Bible shows us that God created two genders for heterosexual attraction, with delight, leading to lifelong monogamous marriage for, among other things, the raising of stable and mature families; and he created sex for procreation with pleasure, and for reinforced bonding of the marriage relationship thereby. This is part of the God-given and God taught order of creation, an order that same sex unions directly contravene. So, however high- minded the participants and however faithful to each other they intend to be, same-sex bodily unions may not be viewed as a form of holiness (the Canadian Anglican General Synod of 2004 was wrong to speak of their ‘sanctity’), any more than sex with an animal (bestiality) can be so viewed. God sets limits, and obedience to him includes observing them. Sex is for marriage, and marriage is a heterosexual partnership, whatever modern society may say.’ [21]
Read it all.