The "midst" of something in the Bible represents the thing that is most central and most important to the spiritual state being described, the motivation that drives everything else. In general this will be something we love or feel, because at the core of things we are what we love; our loves define us.

(Referencias: Apocalypse Revealed 44, 90, 268; Arcana Coelestia 2252, 2940, 10153, 10365, 10557, 10635, 10641)

8506. 'Six days you shall gather it' means the acceptance of truth before it is joined to good. This is clear from the meaning of 'six days' as states of conflict and labour, dealt with above in 8494, at this point states when truth is gaining acceptance, or states when good is being acquired through truth, dealt with immediately above in 8505; for during this state there is labour and conflict. During it a person is pitched into temptations, which are conflicts with the evils and falsities residing with him; at this time the Lord fights for him and also alongside him. But this state is followed by a state in which good and truth are joined together, a state that is accordingly one of rest also for the Lord. This state is what rest on the seventh or sabbath day represented. The reason why it is rest for the Lord is that when good has been joined to truth, a person abides in the Lord and is led by the Lord without labour or conflict. This state is what is meant by the second state spoken of immediately above in 8505.