'The shoulder' signifies all power. In Ezekiel 29:7, this signifies the power or faculty of understanding truth. 'To dwell between his shoulders,' as in Deuteronomy 33:12, signifies being in security and power.

(Odkazy: Arcana Coelestia 1085)

A 'month,' as in Genesis 29, signifies the end of an earlier state and the beginning of a following state, thus a new state. 'A month' signifies a full state.

(Odkazy: Arcana Coelestia 3814)