John 16

For most of three years Jesus had invested in the lives of his closest disciples. He had taught by word and example the truths about God. He had revealed the mysteries of God's new covenant. He had shown them how to preach, heal, and serve those whom God would put in their lives. But in John 16:12 Jesus tells history that three years of teaching was just the tip of the iceberg. There was much more they needed to know. They would learn it over the next few decades. Being taught by God's Holy Spirit (16:13). Then they would pass it on to the disciples whom they would recruit.
Stuart