John 18:4

Jesus therefore, knowing all things that should come (better, were coming) upon him. — Comp. Matthew 26:45.

Went forth, and said unto them, Whom seek ye? — i.e., probably, went forth from the garden itself. (Comp. Note on John 18:26.) Other possible interpretations are, “went forth from the depth of the garden;” or, “went forth from the circle of the disciples standing round;” or, “went forth from the shade of the tree into the moonlight.” For the word, comp. John 18:1, and Matthew 14:14). The kiss of Judas, mentioned in all the earlier Gospels, must be placed here between “went forth” and “said unto them.”

For the question, comp. Matthew 26:50. Jesus will boldly face the danger, and direct it upon Himself, that the disciples may be saved from it (John 18:8).