Part 5 of of a 5-part series on the Golden Rules for Making Money, as set forth in P.T. Barnum's 1880 guidebook Art of Getting Money
The "tools" P.T. Barnum means are the ones who leave each night in the elevator.
"You cannot have too good tools to work with, and there is no tool you should be so particular about as living tools," he writes.
Which employees make the best tools?
The ones who are curious.
The curious employee is the best because "he learns something every day, and you are benefited by the experience he acquires," Barnum says.
"He is worth more to you this year than last, and he is the last man you should part with."
