Isaiah 32:15

At last the great transformation of all things will be ushered in, by an outpouring of spirit(the Heb. has no art.) from on high; i.e. from heaven, as in ch. Isaiah 33:5. The spirit, conceived as a subtle essence descending upon and then permeating the human world, is said to be "poured out" as in ch. Isaiah 29:10; Ezekiel 39:29; Joel 2:28 f. (although different verbs are there used). Any supernatural influence, even when acting to the injury of man, might be so spoken of (ch. Isaiah 19:14; Isaiah 29:10), just as a personal "spirit from Jehovah" may be evil or false (1 Samuel 16:14; 1 Kings 22:21 ff.). Here the word is used absolutely and denotes the Divine principle of life, and especially the power by which the will of God is made to prevail in human society (Isaiah 32:16 f.).

On the second half of the verse see ch. Isaiah 29:17.