| Deepest |
| Central __ |
| Least obvious |
| Deeply personal |
| Hardest to get at |
| Nearest the heart |
| Secret to the max |
| Nearest the center |
| At the very center |
| Extremely personal |
| Nearest the middle |
| Deepest, as thoughts |
| Deepest, as feelings |
| Closest to the center |
| Deepest within oneself |
| Like the hub, relatively |
| Farthest from the surface |
| Deepest, as thoughts or feelings |
| Situated farthest from the edges |
| Like Mercury among all the planets |