Sometimes we are attracted to goods which are not good for us, but the will is attracted by one aspect which is good without reference to other bad aspects, which often leads to sin. Thus, we pray to God for conversion. In the will there is an attraction to the good implanted by the Creator, and this is free will. Free will doesn't consist in indeterminism, like the Nominalists thought. The will has an attraction toward the good, which must be taken into consideration.
Freedom is the attainment of that object which is most connatural.
We are truly free when we have taken into consideration reason and persisted to the good. Just as truth is not a distortion of reason, but an appropriate setting for reason, so the good isn't enslaving to the will, but allows it to be most free, resting in what is most natural to it. The action of the Creator who gifted the will with the inclination toward the good, and of the Redeemer giving the Spirit to strengthen us, means that God isn't destroying our liberty but strengthening it. God respects freedom because he created it. Only God can move the will from within in a way that it is free.