Speak
Like "say," the word "speak" refers to thoughts and feelings moving from our more internal spiritual levels to our more external ones -- and ultimately from the Lord, who is in a sense the most internal spiritual level of all. This is generally called "influx" and "perception" in the Writings, meaning they are thoughts and feelings that flow in in a complete way from the Lord, rather than being things we have to think about and figure out. On a number of occasions "speak" and "say" are used together; in these cases "speak" refers more to intellectual instruction in matters of thought and "say" refers more to feelings and affections that flow in directly.
Arcana Coelestia # 8289
8289. 'The enemy said' means the thought of those ruled by evils and the falsities arising from them, before the Lord's Coming. This is clear from the meaning of 'said' as thought, as in 3395, 7244, 7937; and from the meaning of 'the enemy' as those ruled by evils and falsities, since no others are meant in the spiritual sense by 'the enemy', 8282. The reason why their thought before the Lord's Coming is meant is that the hellish crew were prowling around at that time in almost complete freedom, molesting all who were there and trying to place them in subjection. Their thought at that time is described in the present verse by 'I will pursue, I will overtake, I will divide the spoil; my soul will be filled. I will unsheathe the sword, my hand will drive them out'. But when the Lord came into the world their boasting was changed to lamentation, described in the verse immediately following by 'You blew with Your wind, the sea covered them over; they sought a deep place like lead in the mighty waters'. Regarding their change of state brought about by the Lord's Coming, see 6854, 6914, 7091, 7828, 7932, 8018, 8054.