What does this teach us? Simply this, that when God sends a man with a message, it matters nothing whether he can speak or not. He may be deaf and dumb, yet if he goes forward trusting in the Lord, he will be able, when the proper time comes, to speak so that all will hear and understand. “For it is not ye that speak, but the Spirit of your Father, which speaketh in you.” 2Matthew 10:20. The promise of the Lord is, “I will give you a mouth and wisdom.” 3Luke 21:15. “I have put My words in thy mouth.” 4Isaiah 2:16. EVCO 178.1
The Spirit of God can make a dumb man eloquent; without the Spirit, all the eloquence of the most accomplished orator amounts to nothing. (See Isaiah 3:1-3.) EVCO 178.2