This opening verse to the final part of Samson’s career functions as a parallel to Judges 14:1. Samson went to a Philistine town and saw a woman. So we seem to be back to square one. Yet not quite, since the differences are more than the similarities. In Judges 14:1 we read, Samson went down to Timnah.
That descent from Israelite territory to Philistia was physical, from uplands to foothills, but it also implied a moral descent, from the Promised Land to the land of the uncircumcised. In Judges 16:1, we read that Samson went to Gaza.
The verb here is different than in Judges 14:1; there, the verb yarod (he went down
) was used, while here the more neutral verb halach (he went
) is in use. That the verb yarod (to go down
) is absent implies that Samson’s starting point is in Philistia, not Israel; thus, he did not go down because he already was down.1
1 Samson went to Gaza, and there he saw a prostitute, and he went in to her.