According to Dan Siegel there are nine aspects of integration: consciousness, vertical, bilateral, memory, narrative, state, interpersonal, temporal, transpirational.   Each of these, at a different level, involves resonance between clearly differentiated elements - whether at the level of cognition, the brain, phenomenal consciousness, or society.  The result in each case is an optimal mode of functioning involving flexibility, adaptation, coherence, cohesion, energy and stability (FACES), a pattern of development and learning that can be modeled mathematically.   Generically it is always a matter of sharply differentiated elements (as opposed to a sort of vague adulteration) that resound in a circuit sustaining their differentiation (as opposed to chaos).   This pattern of functioning is inherently expansive: learning, creation and an increase   in integration are inevitable if a steady state of integration is at play.  Practical reason at its finest