What is the Second Dimension? The second dimension is the linear surface plane. If this switch is closed 1, we are only interested in traveling from point A to point B. If this switch is open 0, we enjoy the journey while traveling from point A to point B. Linear Understanding The second dimension is the underlying method of Linear Understanding. This would be through intuition (inner understanding) or through the five senses (outer understanding): seeing, hearing, smelling, touch and taste. (c) Copyright Jonn Lavinnder, 2007. All rights reserved.