All that glitters is not gold. Square dancing is gorgeous.

The original text said: "You can't judge a person's identity and ability only by his appearance, let alone measure the depth of the sea with a bucket (a measuring tool). The word "elephant" here may be a slip of the pen, and "ladle" is a kind of daily necessities for scooping water. In this sentence, it means the same as "bucket" and "wawa".