In my Ko-Fi Shop: The Interior or Hidden Life by Thomas C. Upham (1799–1872). $2.00 or whatever you think it's worth.
In his book on Upham’s theology, Darius Salter wrote:
“Upham’s writings are the first attempt to weigh the tenants of holiness theology within the rubrics of psychological investigation. His findings are integral to the history of the psychology of religion. Upham’s Principles of the Interior [or Hidden] Life (1843) may be the best attempt to stress experiential holiness theology within a psychological context.”
Because I consider the 1844 second edition a significant improvement on the 1843 first edition, I have based my online edition on it.
I am feeling much more confident in my EPUB skills, so this time I have recommended the EPUB edition. The PDF is quite good also. The AZW3 edition was created by the Calbre program and it should work fine. Nevertheless, please let me know of any problems you may encounter, so that I can improve my skills with these.
BONUS FEATURES: This edition includes Alpheus Packard's Address on the Life of Thomas C. Upham delivered in 1872, and Thomas C. Upham's personal testimony to sanctifying grace, which was included in Phoebe Palmer's book Forty Witnesses.