From a footnote in the Jerusalem bible (66).
The O.T. speaks of the word of God, and of his Wisdom,
present with God before the world was made, cf. Pr 8:22+; Ws 7:22+;
by it all things were created;
it is sent to earth to reveal the hidden designs of God;
it returns to him with its work done, Is 55:10-11; Pr 8:22-36; Si 24:3-22; Ws 9:9-12.
On its creative role, cf. also Gn 1:3,6 etc.; Is 40:8,26; 44:24-28; 48:13; Ps 33;6; Jdt 16:14; Si 42:15;
on its mission, cf. Ws 18:14-16; Ps 107:20; 147:15-18.
For John, too, 13:3; 16:28,
the Word existed before the world in God, 1:1,2; 8:24+; 10:30+;
it has come on earth, 1:9-14; 3:19; 9:39; 12:46, cf. Mk 1:38+,
being sent by the Father, 3:17,34; 5:36,43; 6:29; 7;29; 8:42; 9:7; 10:36;11:42;17:3,25, cf. Lk 4:43,
to perform a task, 4:43+,
namely to deliver a message of salvation to the world, 3;11+; 1:33+;
with its mission accomplished it returns to the Father, 1:18; 7:33; 8:21; 12:35; 13:3; 16:5; 17:11,13; 20:17.
The Incarnation enabled the N.T., and especially John, to see this separately and eternally existent Word-Wisdom as a person.