Stephen W. Sears states that "Jackson was fanatical in his Presbyterian faith, and it energized his military thought and character. Theology was the only subject he genuinely enjoyed discussing. His dispatches invariably credited an ever-kind Providence." According to Sears, "this fanatical religiosity had drawbacks. It warped Jackson's judgment of men, leading to poor appointments; it was said he preferred good Presbyterians to good soldiers." James I. Robertson, Jr. suggests that Jackson was "a Christian soldier in every sense of the word". According to Robertson, Jackson "thought of the war as a religious crusade", and "viewed himself as an Old Testament warrior—like David or Joshua—who went into battle to slay the Philistines".