Jewels on Earth

पृथिव्यां त्रीणि रत्नानि जलमन्नं सुभाषितम् |
मूढै: पाषाणखण्डेषु रत्नसंज्ञा प्रदीयते ||
Meaning : There are three jewels on earth: water, food, and adages. Fools, however, regard pieces of rocks as jewels.