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.

3037. 'And who spoke to me, and who swore to me, saying' means the Divine itself from whom came His Divine will and understanding. This is clear from the meaning of 'speaking' as perceiving, dealt with in 3029, and also as willing, 2626; and from the meaning of 'swearing' as confirmation from the Divine and as that which has reference to truths which belong to the understanding, 2842. When Jehovah is referred to as 'speaking' the meaning in the internal sense is that He wills, for whatever Jehovah speaks He also wills. But when Jehovah is referred to as 'swearing' the meaning in the internal sense is that He understands it to be true. Thus when used in reference to Jehovah, 'swearing' means understanding, as becomes clear also from the places quoted from the Word in 2842.