The phrase "the meek shall inherit the Earth" comes from the Bible, specifically the Gospel of Matthew, where it is preached in the context of the beatitudes. The beatitudes are a set of blessings uttered by Jesus Christ during the Sermon on the Mount. The full verse reads:

"Blessed are the meek, for they will inherit the Earth." (Matthew 5:5, ESV)

In this verse, the term "meek" refers to individuals who are humble, gentle in spirit, and patient in nature. It emphasizes the value of a humble and gentle disposition, highlighting that such individuals will find favor and blessing from God.

The promise of inheriting the Earth refers to the fulfillment of God's covenant with His people, where He promises to give them a blessed and fruitful land. In a metaphorical sense, inheriting the Earth can also symbolize blessings, prosperity, and divine favor in various aspects of life.

The reference to the "glum" in your statement does not appear in the original Bible verse or its context. The beatitude highlights the significance of meekness, not glumness or sadness.