From the Wikipedia article on Meher Baba:
From July 10, 1925 until his death in 1969, Meher Baba was silent. He communicated first by using an alphabet board, and later by unique hand gestures which were interpreted and spoken out by one of his mandali, usually by his disciple Eruch Jessawala. Meher Baba said that his silence was not undertaken as a spiritual exercise but solely in connection with his universal work.Do you get the message?
Meher Baba often spoke of the moment "that he would 'break' his silence by speaking the 'Word' in every heart, thereby giving a spiritual push forward to all living things."
"When I break My Silence, the impact of My Love will be universal and all life in creation will know, feel and receive of it. It will help every individual to break himself free from his own bondage in his own way. I am the Divine Beloved who loves you more than you can ever love yourself. The breaking of My Silence will help you to help yourself in knowing your real Self."
Meher Baba said that the breaking of his silence would be a defining event in the spiritual evolution of the world.
When I speak that Word, I shall lay the foundation for that which is to take place during the next seven hundred years.
On many occasions Meher Baba promised to break his silence with an audible word before he died, often stating a specific time and place when this would occur. His failure to fulfill these promises disappointed some of his followers, while others regarded these broken promises as a test of their faith. Some followers speculate that "the Word" will yet be "spoken," or that Meher Baba did break his silence but in a spiritual rather than a physical way.
According to all contemporary accounts, Meher Baba remained silent until his death, but more than thirty years later one close disciple recalled that Meher Baba had spoken to him a few hours before he died, although this recollection contradicted his own earlier accounts.
Each July 10, many of Baba's followers celebrate Silence Day to honor him.