In Italy there is a grave of a man who died over a century ago. He was an unbeliever and completely against Christianity, though a little afraid of it, too. So the man had a huge stone slab put over his grave and had the following message engraved in it: “I do not want to be raised from the dead. I don’t believe in it.”
Evidently, when he was buried, an acorn must have fallen into the 
grave. A hundred years later the acorn had grown up through the grave and split that slab. It was now a tall towering oak tree.
If an acorn, which has power of biological life in it, can split a slab of that magnitude, what can the “acorn” of God’s resurrection power do in a person’s life?
Reflecting on this, pastor and author Tim Keller says:
The minute you decide to receive Jesus as Saviour and Lord, the power of the Holy Spirit comes into your life.
It’s the power of the resurrection – the same thing that raised Jesus from the dead… Think of the things you see as immovable slabs in your life – your bitterness, your insecurity, your fears, your self-doubts. Those things can be split and rolled off. The more you know Jesus, the more you grow into the power of the resurrection.
Included in a recent “Leadership Journal” email; preachingtoday.com/illustrations/2012/march/7032612.html.
Sprouting acorn picture found via Google Images.
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4th Point 