research by Adam Grant and Francesca Gino has shown that saying thank you not only results in reciprocal generosity — where the thanked person is more likely to help the thanker — but stimulates prosocial behavior in general. In other words, saying “thanks” increases the likelihood your employee will not only help you, but help someone else.

It is a remark constantly made by some that an orator must be skilled in all arts if he is to speak upon all subjects. I might reply to this in the words of Cicero, in whom I find this passage: "In my opinion, no man can become a thoroughly accomplished orator unless he shall have attained a knowledge of every subject of importance and of all the liberal arts," but for my argument, it is sufficient that an orator be acquainted with the subject on which he has to speak.