Conversion is not the smooth, easy-going process some men seem to think … It is wounding work, of course, this breaking of the hearts, but without wounding there is no saving. … Where there is grafting there is a cutting, the scion must be let in with a wound; to stick it on to the outside or to tie it on with a string would be of no use. Heart must be set to heart and back to back, or there will be no sap from root to branch, and this I say, must be done by a wound.