“Like the dew of Chermon that falls upon the mountains of Tzion. There Hashem ordained blessing, everlasting life” PSALMS 133:3 (The Israel Bible™)
Tal (טל), ‘dew,’ is a common biblical symbol of Hashem’s bountiful blessings. Rain is another sign of God’s love for mankind. What is the difference between rain and dew? According to Jewish mysticism, rain is a sign of God showering his abundant blessings freely from above. Dew, which forms below from condensation of atmospheric water vapor, is related to the divine blessings which are a result of man’s own efforts and achievements. This psalm teaches that Hashem’s blessing from above allows for the flowering of man’s work below.