Generally speaking, people who are at lower levels of an organization serve those at higher levels. Bosses boss and their employees serve; coaches devise strategy and players do what the coach tells them to do; engineers design car parts and workers assemble them according to the engineers' instructions. Ideally, of course, it's a two-way street: A good boss knows he is really there to help his employees succeed; a good coach creates strategies based on his players' strengths. Even there, though, the boss and coach are really working in service of a higher goal, seeking organizational success. The same is true in the spiritual sense of the Bible. When someone serves another, they are in a lower state, serving a higher state (or a deeper evil, if they are being enslaved by people who represent evil). This can take many different forms, depending on the circumstances. In many cases, this creates a connection between "service" and intellectual things. This is because who we are is determined by what we love; our loves are the deepest part of us. What we think, our reasoning and intellect and the things we learn about, come from those loves and serve those loves.

424. And he cried with a great voice, signifies Divine command. This is evident from the signification of "a great voice," when from the Lord, as meaning Divine command. The command itself, uttered by the voice, also follows, namely, that "the four angels hurt not the earth, nor the sea, nor the trees, till the servants of God were sealed on their foreheads." It is said "a great voice" and "he cried," because "great" and also "crying" are predicated in the Word of the good of love (that "great" is predicated of the good of love, and "many" of truths from good, see above, n. 336, 337; and "crying" of the affections that are of love, see above, n. 393); here, therefore, as this command was from the Divine love and from the Divine will, it is said, "he cried with a great voice."