To not loose: 1. His memories of his mother. 2. His grip on humanity, however tenuous. 3. His connection to his team at home. 4. His self control. 5. His memory.
To loose: 1. The memory of Orionquest. 2. The Relative. Or the bug, for that matter. 3. His nightmares, both received and personal. 4. This continued argument with Mitsuru. 5. His scars.