At the beginning of time there shone a light called the "Ohr Haganuz." With this light you could see from one end of the world to the other - meaning you could see the connection between cause and effect. God hid that light away after 36 hours but there are still times when you can still catch its glow.
As long as Yisrael does not dwell on its Land, the Land does not give her fruits as she is accustomed. When she will begin to flower again, however, and give of her fruits, this is a clear sign that the end — the time of the Redemption — is approaching when all of Yisrael will return to its Land. The Maharsha