Notice what one of the main manifestations of God's Spirit is: words. The entire revelation of God - the Bible - is composed of words. If His Word is not a manifestation of God's Spirit, we do not know what is! Many of these words are the words of God Himself. Many of them are words of God's servants that have been written down for our admonition.

Everything, though, comes down to words because the way of God is a set of ideas. These ideas we put down on paper as words, or when we speak, we speak them as words. We cannot understand them otherwise.

The servant of God may do other works. He can perform healings, which are not necessarily manifested as words, although often words accompany a healing, specifically a prayer. Casting out demons is similar, as there is usually a prayer involved. Miracles, too, often involve certain words that are spoken to beseech God to act. But the works themselves - the healings, the casting out of demons, the miracles - are not words, but they are manifestations of the Spirit.

However, the primary job of a servant of God is to speak or to write words to convict people of God's truth. So, in the speaking or in the writing of words, he witnesses for God. In the end, in the final analysis, the witness of the Two Witnesses is words. They will give evidence, testimony, for God.