Full Idea
Neither benevolence nor any other affection or desire can be directly raised by volition; if they could, then we could be bribed into any affection whatsoever toward any object.
Clarification
'Volition' is choice
Gist of Idea
We cannot choose our moral feelings, otherwise bribery could affect them
Source
Francis Hutcheson (Treatise 2: Virtue or Moral Good [1725], §II.IV)
Book Reference
'British Moralists 1650-1800 Vol. 1', ed/tr. Raphael,D.D. [Hackett 1991], p.274
A Reaction
Of course, notoriously, the vast mass of people have often been bribed to love a politician, by low taxes, or bread and circuses. Still, you cannot choose to love or admire someone, you just do. Not much free will there.