IF any one should give me a dish of sand and tell me that there were particles of iron in it, I might look with my eyes for them, and search for them with my clumsy fingers, and be unable to find them; but let me take a magnet and sweep it, and how it would draw to itself the most invisible particles by the mere power of attraction! The unthankful heart, like my finger in the sand, discovers no mercies; but let the thankful heart sweep through the day, and, as the magnet finds the iron, so it will find in every hour some heavenly blessings; only, the iron in God's sand is gold.—O. W. Holmes.