It's helpful to become familiar with common chord progressions - and the linked site even has one labeled gospel chord progression (although I disagree with their nomenclature "the IV chord of the IV chord" - this is normally called the bVII [flatted seventh] chord). It's can also be very helpful to become familiar with the circle (or cycle) of fifths, which relates nicely to said progressions. s&r has dipped a toe in the water here for I-IV-V progressions, but as you've seen that doesn't cover all the bases. The concept becomes much more valuable when you have more progressions in mind to work with.