The Torah, “Leviticus,” 27:1 – 27:4, 27:7: And the LORD spoke unto Moses, saying, Speak to the children of Israel, and say to them: When a man expresses a vow [pledging the] value of lives to the LORD, the [fixed] value of a male shall be as follows: From twenty years old until sixty years old, the value is fifty silver shekels, according to the holy shekel. And if she is a female, the value is thirty shekels;
And if [the person is] sixty years old or over, if it is a male, the value shall be fifteen shekels, while for a female, it shall be ten shekels.
Value refers to the size of the desire, to its intensity, which a person must express in his relationship with the Creator. The meaning of “When a man expresses a vow [pledging the] value of lives to the LORD” is according to this value.
A shekel symbolizes the desire that is required of a person called a man or a woman at a certain age. This is determined according to the intensity they work in order to bestow and thus are similar to the Creator and connected to Him.
From KabTV’s “Secrets of the Eternal Book” 12/10/14