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.

Our feet are the lowest parts of our bodies, and they're very useful! In the Bible, feet represent the lowest and most utilitarian part of our spiritual selves -- the “natural” level. This everyday aspect of life is involved with routine tasks and demands and the thoughts associated with them. It's not terribly deep or introspective, but it is useful -- just like feet. This correspondence is true of the Lord and of church communities, too. The Lord's Divine Natural leads us through relatively simple obedience (think of the Ten Commandments). Churches, too, have a natural level on which they serve their communities in simple but tangible ways.