"But," you say, "What about the 400 year 'silent period' between the Old Testament and the New? To that I would give the same answer that the rich man in Hell received in the story Jesus told (a story that I believe to be an actual event that probably took place during the so-called "silent period"). The rich man asked for someone to be sent to his family to warn them about that place of torment. The answer given was "They have Moses and the prophets; let them hear them."
You see, God wasn't silent, but He was speaking through His recorded Word. Priests were reading His Word in synagogues. The Spirit of God was very much active in leading men to proclaim the truths of His Word, just like He is today. The problem is, most of the religious crowd of the day, just as they continue to do today, had ignored the truths of His Word and added many things to it that were not of God. Jesus would clear those up when He came.
So, all this made me think through Biblical History, and (without doing an in depth study) I jotted down a basic timeline of 7 periods of History that may be helpful for anyone who is seeking to hear from God but thinks He is silent. (The years I give for each period are very loosely estimated):
1. Adam to Noah (about 2,000 yrs) - God spoke directly to individuals He chose, and He gave them the responsibility of spreading the Word that He gives to as many as would hear and believe.
2. Noah to Moses (about 1,000 yrs) - God continued to speak directly to individuals He chose, but there were apparently still families that raised their children according to the Words that were given to Noah (although there were many corruptions added to or taken from God's Words).
3. Moses to the Judges (about 500 yrs) - God gave Moses the Law (His direct Words), and the Spirit lead certain individuals to teach it and to enforce it.
4. Judges to the Kings and Prophets (about 300 yrs) - The time of the Judges is often called the "Dark ages" of the Old Testament. God's people, the people He had continues speaking to through His Word, forsook Him and kept forsaking His Word. God would then judge them harshly and allow them to be taken over by other nations in violent war. Then, when the people would begin seeking God, He would raise up judges and empower them to deliver God's people from their enemies.
5. Prophets to Jesus (about 400 yrs) - This is the so-called "silent period," but as I said, God had made His Word available through the prophets, and that Word was to be preached by the priests in the synagogues and taught in the home.
6. Jesus to the Apostles (about 100 yrs) - Obviously, this was the most important time in History! Jesus was a fulfillment of everything God had spoken since Adam. Jesus did not contradict or destroy the Old Testament, but He "fulfilled it." Jesus WAS the Word of God! He taught His disciples many things and promised them that when He was gone, the Holy Spirit would come upon them and bring to their remembrance everything He had taught them so they could preach the very Word of God, write it down, and spread it to the entire world.
7. Apostles to the Millennium (2,000+ yrs) - With the death of the Apostles, the Word of God had been completed. Just as He has always done, the Spirit of God still directs certain people (that God chooses) to preach His Word (sort of like the Old Testament prophets, only now the entire Bible is complete, including the records of things that are yet to come), and has been made available to all people. Until the appointed time when Christ comes again, God has left His Word in written form for us to study, teach, and preach. He still speaks! He is not, nor has He ever been, silent!