Reasons to remain Anglican, or to convert

We find ourselves under the Anglican regimen; let every one of us, cleric and layman, remain in it, till our opponents have shown cause why we should change, till we have reason to suspect we are wrong.
[...]

And further, a debt of gratitude to that particular branch of the Church Catholic through which GOD made us Christians, through which we were new born, instructed, and (if so be) ordained to the ministerial office; a debt of reverence and affection towards the saints of that Church; the tie of that invisible communion with the dead as well as the living, into which the Sacraments introduce us; the memory of our great teachers, champions, and confessors, now in Paradise [...] bind us to the English Church, by cords of love, except something very serious can be proved against it. But this surely is impossible. The only conceivable causes for leaving its communion are, I suppose, the two following; first, that it is involved in some damnable heresy; or secondly, that it is not in possession of the sacraments.

Tract 71

[Roger]