Arcana Coelestia #9651
9651. 'Two bases under one board' means through a joining to good, as also above, in 9645.
Arcana Coelestia #9645
9645. 'Two bases under one board' means the joining of it to the good. This is clear from the meaning of 'two' as a joining together, dealt with in 5194, 8423; from the meaning of 'bases' as truth through which support is received, dealt with in 9643; and from the meaning of 'board' as good that lends support, as immediately above in 9644.