People
Pride slays thanksgiving, but an humble mind is the soil out of which thanks naturally grow. A proud man is seldom a grateful man, for he never thinks he gets as much as he deserves.
— Henry Ward Beecher

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Gratitude grows in humility, the quote says, and pride smothers it. It uses a soil metaphor: a humble mind is where thanks naturally sprout. Proud people rarely feel thankful because they think they deserve more than they've been given, so nothing ever seems like a gift.
Context reviewed