St. Thomas and conscience

[ptlopes]

Hello, everyone!

In his "Beatitude", Garrigou-Lagrange says that conscience, when binding, is called commanding or forbidding conscience. When not binding, it is called permitting or advising conscience.

However, Henri Grenier says in "Thomistic Philosophy" that antecedent conscience "binds" or "incites" and doesn't mention any permitting conscience.

In his textbook about moral philosophy, Charles Coppens writes: "conscience, then, may be defined as a practical judgment formed by reasoning from a universal principle to a particular fact, whereby I decide whether a certain individual act ought to be done or omitted, or whether it may be done or omitted, at my choice." Copper doesn't write about any "advising conscience"

Why do they disagree? Was St. Thomas clear about this?

Thanks and God bless you!