The Levels of Development create a vertical dimension within each Enneagram type. There are nine levels ranging from healthy (levels 1-3) to average (levels 4-6) to unhealthy (levels 7-9).
A person will operate within a range of levels (e.g., levels 2-4, levels 6-8, etc.). This range will vary throughout a lifetime. Two people of the same type will look different when they're operating from different levels.
Below are two words associated with each level for type 4 as described in the book "The Wisdom of the Enneagram" by Don Riso and Russ Hudson.
Level 1 - Life-Embracing, Life-Enhancing
Level 2 - Introspective, Sensitive
Level 3 - Self-Revealing, Creative
Level 4 - Romanticizing, Individualistic
Level 5 - Self-Absorbed, Temperamental
Level 6 - Self-Indulgent, Decadent
Level 7 - Hateful, Alienated
Level 8 - Self-Rejecting, Clinically Depressed
Level 9 - Despairing, Life-Denying
Click here for descriptions of all nine type 4 levels. If you're not taken to the correct part of the web page when it appears then scroll down to the middle of the web page and look for the section on Levels of Development.