Positive means you succeeded, and negative means you rolled low. Sorry, I said that wrong. Let me rephrase: "(ahem) Lo, should you roll the blessed stones of chance, by way of striking the area to which button depression is preformed, and your faith in Him the God-Emperor is strong, untainted by impure thoughts and the touch of vile xenos and malformed mutant flesh, then thou shall see that the runes indicate a number above zero, and lo, also include a measure in which to judge thy Emperor's blessings. Should thy faith be weak, thou conversed with vile xenos, or posses the fouled, mutated flesh, then thy runes shall indicate a negative, revealing that thy's faith in the Emperor is not simply weak, but besieged with sins against Him and his church."