of the invisible and the underground growth, or else the life will be feeble and short-lived and the external growth sickly and fruitless. In the Book of the prophet Isaiah these words are written: “They that wait on the Lord shall renew their strength; they shall mount up with wings as eagles; they shall run and not be weary; and they shall walk and not faint.” Isaiah 40:31. This is the genesis of the whole matter of activity and strength of the most energetic, exhaustless and untiring nature. All
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