I recently got my own copy of "Elias Hicks: Quaker Liberal," a book I borrowed from my university's library but did not finish before graduating and returning the book.  On page 186, it says that the last page of Hicks' home journal finally answered a question both Friends and non-Friends frequently asked:  what is required of a Christian?  His answer has 3 parts.

1. a real belief in God and Christ, as one undivided essence, known and believed in, inwardly and spiritually
2. a complete passive obedience and submission to the divine will and power inwardly and spiritually manifested; which when known, brings to the Christian state, through a crucifixion of the old man, with all his ungodly deeds
3. in order for the preservation and well-being of a Christian, it is necessary that they often meet and assemble together, for the promotion of love and good works, and as good stewards of the manifold grace of God...and no temporal concern of the greatest magnitude ought to be considered as a sufficient excuse for omitting this great and necessary duty

This was in January 1819.