I have asked it before on FE, and if I have asked it here too, please forgive me. But I can't reach a conclusion:
  For every salutary act internal supernatural grace of God (gratia elevans) is absolutely necessary. (De fide.)
Actual Grace is not necessary for the performance of a morally good action. (Sent. certa.)
And what CM pointed out recently:
"Pope Pius St. V, Ex Omnibus 27: “Free will, without the help of God's grace, has power only for sin.” - CONDEMNED.

The only conclusion I reached is that we can do good without grace, but it will have no effect on our salvation. Also maybe we can avoid some sins (not ofcoarse all sins and not for a considerable amount of time) but still without any effect on our salvation.

Is it right?

 Thanks for the link.
  I am afraid of having a heretical opinion. It is why I ask so many questions, to make sure that there is no error in my mind.
 

The only conclusion I reached is that we can do good without grace, but it will have no effect on our salvation. Also maybe we can avoid some sins (not ofcoarse all sins and not for a considerable amount of time) but still without any effect on our salvation.

Is it right?

Sounds like you've got it.  Calvinists, of course, will disagree.

Quote from: spouse of Jesus

Thanks for the link.
  I am afraid of having a heretical opinion. It is why I ask so many questions, to make sure that there is no error in my mind.
 

Just for the record, according to Aristotle/Aquinas, our minds are naturally ordered to accept the truth when we hear it - so as long as you are not intentionally rejecting what is obviously true, you are unlikely to fall into a heretical opinion and certainly not willfully - so don't worry :)

That is so interesting, never knew that!  I had one nun, who would always say, pray for the grace to know the truth when you hear it, and pray  harder to act on the knowledge.  

Quote from: Jamie

Quote from: spouse of Jesus

Thanks for the link.
  I am afraid of having a heretical opinion. It is why I ask so many questions, to make sure that there is no error in my mind.
 

Just for the record, according to Aristotle/Aquinas, our minds are naturally ordered to accept the truth when we hear it - so as long as you are not intentionally rejecting what is obviously true, you are unlikely to fall into a heretical opinion and certainly not willfully - so don't worry :)

That is so interesting, never knew that!  I had one nun, who would always say, pray for the grace to know the truth when you hear it, and pray  harder to act on the knowledge.  

That is definitely a good prayer - because the grace of God can help us to remain strong against the temptation to lie or willfully disregard the truth.  This is why all sins are bad - because when you hear truth your intellect immediately adheres to it, and when you lie, you are going against your nature by speaking the opposite of what your intellect tells you is true.

The prayer is also good in that we can intentionally avoid the truth by not seeking the answer to certain questions because we are not sure we will like the answer.  I don't think this is sinful but it is certainly not prudent.