There is a lot of pride in the statements together. In other words, your saying your works gives you an advantage over everybody else, that your more deserving because of your many works. It is boasting before God. Because your claiming your many works will get you into heaven without Him. That you don't need God.
No one is saying, don't do works. But that our works do NOT account for salvation. The rcc just can't stand the idea that God loves sinners so much that HE willing to let them off the hook, without them having to be good enough. But to simply believe that HE has done so through faith in the work of His son.
The rcc teaching is that works is about "what you will get" not because you actually have a love for God. But what is in it for you. God ignores all human plans of salvation, no matter how wise they seem to be, and ignore the best ideas of men, even the most brilliant of them. Our plans of salvation can not satisfy God's requirement for the penalty of sin. Which is why Jesus said "it is finished" on the cross. He paid the debt in full.
The way rc's speak, the "works" done amounts to mere words and actions learned by rote. If you are counting on your many mouthfuls of blood and flesh eating and works to save you, then Jesus is of no use to you. And you have fallen from God's grace, because you are counting on your works to save you.