diff --git a/lib/cancan/ability.rb b/lib/cancan/ability.rb
index ae243ca..b2fbcf9 100644
--- a/lib/cancan/ability.rb
+++ b/lib/cancan/ability.rb
@@ -219,13 +219,5 @@ module CanCan
         :update => [:edit],
       }
     end
-    
-    def includes_action?(actions, action)
-      actions.include?(:manage) || actions.include?(action)
-    end
-    
-    def includes_subject?(subjects, subject)
-      subjects.include?(:all) || subjects.include?(subject) || subjects.any? { |c| c.kind_of?(Class) && subject.kind_of?(c) }
-    end
   end
 end
diff --git a/lib/cancan/can_definition.rb b/lib/cancan/can_definition.rb
index 17dc844..5c598ea 100644
--- a/lib/cancan/can_definition.rb
+++ b/lib/cancan/can_definition.rb
@@ -33,7 +33,7 @@ module CanCan
     end
     
     def matches_subject?(subject)
-      @subjects.include?(:all) || @subjects.include?(subject) || @subjects.any? { |c| c.kind_of?(Class) && subject.kind_of?(c) }
+      @subjects.include?(:all) || @subjects.include?(subject) || @subjects.any? { |sub| sub.kind_of?(Class) && subject.kind_of?(sub) }
     end
     
     def can_without_base_behavior?(action, subject, extra_args)
diff --git a/lib/cancan/controller_resource.rb b/lib/cancan/controller_resource.rb
index 83065e0..d2f18cb 100644
--- a/lib/cancan/controller_resource.rb
+++ b/lib/cancan/controller_resource.rb
@@ -1,4 +1,5 @@
 module CanCan
+  # Used internally to load and authorize a given controller resource.
   class ControllerResource # :nodoc:
     def initialize(controller, name, parent = nil, options = {})
       raise ImplementationRemoved, "The :class option has been renamed to :resource for specifying the class in CanCan." if options.has_key? :class
@@ -9,12 +10,13 @@ module CanCan
     end
     
     def model_class
-      if @options[:resource].nil?
+      resource_class = @options[:resource]
+      if resource_class.nil?
         @name.to_s.camelize.constantize
-      elsif @options[:resource].kind_of? String
-        @options[:resource].constantize
+      elsif resource_class.kind_of? String
+        resource_class.constantize
       else
-        @options[:resource]
+        resource_class # likely a symbol
       end
     end
     
diff --git a/lib/cancan/resource_authorization.rb b/lib/cancan/resource_authorization.rb
index badb0ef..21429df 100644
--- a/lib/cancan/resource_authorization.rb
+++ b/lib/cancan/resource_authorization.rb
@@ -1,7 +1,7 @@
 module CanCan
+  # Handle the load and authorization controller logic so we don't clutter up all controllers with non-interface methods.
+  # This class is used internally, so you do not need to call methods directly on it.
   class ResourceAuthorization # :nodoc:
-    attr_reader :params
-    
     def self.add_before_filter(controller_class, method, options = {})
       controller_class.before_filter(options.slice(:only, :except)) do |controller|
         ResourceAuthorization.new(controller, controller.params, options.except(:only, :except)).send(method)
@@ -20,17 +20,17 @@ module CanCan
     end
     
     def load_resource
-      unless collection_actions.include? params[:action].to_sym
-        if new_actions.include? params[:action].to_sym
-          resource.build(params[model_name.to_sym])
-        elsif params[:id]
-          resource.find(params[:id])
+      unless collection_actions.include? @params[:action].to_sym
+        if new_actions.include? @params[:action].to_sym
+          resource.build(@params[model_name.to_sym])
+        elsif @params[:id]
+          resource.find(@params[:id])
         end
       end
     end
     
     def authorize_resource
-      @controller.authorize!(params[:action].to_sym, resource.model_instance || resource.model_class)
+      @controller.authorize!(@params[:action].to_sym, resource.model_instance || resource.model_class)
     end
     
     private
@@ -54,7 +54,7 @@ module CanCan
     end
     
     def model_name
-      params[:controller].sub("Controller", "").underscore.split('/').last.singularize
+      @params[:controller].sub("Controller", "").underscore.split('/').last.singularize
     end
     
     def collection_actions