The pouring of spirit upon all flesh is the descent of higher awareness through the whole body, the finer energy saturating every part of a person rather than remaining sealed in the head. Sons and daughters are the active and receptive powers within, the outgoing and inward faculties of one mind, both quickened to speak from a deeper source. The old men who dream are the settled, matured centers of a person, releasing their wisdom through the imagery of sleep. The young men who see visions are the fresh, ascending energies, their inner sight opened while awareness is still climbing.
What is described is an awakening spread through the entire person: every faculty, seasoned or new, active or receptive, comes alive with a knowing that was not there before.
All flesh: the whole body of a person, every part reached and saturated by descending awareness
Sons and daughters: the active and receptive powers within, the outgoing and inward faculties of one mind
Old men: the settled, matured inner centers, releasing wisdom through the imagery of dreams
Young men: the fresh, ascending energies whose inner sight opens while awareness is still climbing