diff --git a/core/include/mind.h b/core/include/mind.h
index 9a264be..af5b172 100644
--- a/core/include/mind.h
+++ b/core/include/mind.h
@@ -2,18 +2,16 @@
 #define _MIND_H
 
 #include <thought.h>
+#include <subconscious.h>
 
 class Mind
 {
 public:
-	void Mind::wander(void)
+	void wander(void)
 	{
-		for (;;)
-		{
-			Thought		idleThought(subconscious);
+		Thought		idleThought(subconscious);
 
-			idleThought.walk(mind);
-		}
+		idleThought.walk();
 	}
 
 public:
diff --git a/core/include/subconscious.h b/core/include/subconscious.h
index 5b2f50a..bbd3c40 100644
--- a/core/include/subconscious.h
+++ b/core/include/subconscious.h
@@ -1,7 +1,10 @@
 #ifndef _SUBCONSCIOUS_H
 #define _SUBCONSCIOUS_H
 
+#include <thoughtContentSource.h>
+
 class Subconscious
+: public ThoughtContentSource
 {
 };
 
diff --git a/core/include/thought.h b/core/include/thought.h
index b11a99b..f6d1927 100644
--- a/core/include/thought.h
+++ b/core/include/thought.h
@@ -1,10 +1,26 @@
 #ifndef _THOUGHT_H
 #define _THOUGHT_H
 
+#include <iostream>
 #include <scene.h>
+#include <thoughtContentSource.h>
 
 class Thought
 {
+public:
+	Thought(ThoughtContentSource csource)
+	{}
+
+	void walk(void)
+	{
+		for (;;)
+		{
+			step();
+		}
+	};
+
+	void step(void) { std::cout <<"Step\n"; }
+
 public:
 	Scene	scene;
 };
diff --git a/core/include/thoughtContentSource.h b/core/include/thoughtContentSource.h
new file mode 100644
index 0000000..d50cf57
--- /dev/null
+++ b/core/include/thoughtContentSource.h
@@ -0,0 +1,8 @@
+#ifndef _THOUGHT_CONTENT_SOURCE_H
+#define _THOUGHT_CONTENT_SOURCE_H
+
+class ThoughtContentSource
+{
+};
+
+#endif
diff --git a/core/main.cpp b/core/main.cpp
index 65591d9..7b4dd52 100644
--- a/core/main.cpp
+++ b/core/main.cpp
@@ -2,6 +2,8 @@
 
 int main(int argc, char **argv)
 {
+	Mind	mind;
+
 	for (;;)
 	{
 		mind.wander();