Ron,
Understand that Justification and Sanctification are seen by Catholics as complementary ways of talking about the same thing. And not just any sin can get you to be “re-justified” but by committing a grave/mortal sin can turn you away from God. For catholics it’s about being IN GRACE or NOT IN GRACE. If you are weak and constantly commit mortal sins then this may be like a rollercoster for you. Coming in and out of Grace. We just feel thankful that at least now we are able to please God ([color=red:24o4a6ai]when you are in Grace[/color:24o4a6ai]) because of what was done at Calvary for us. Does that help?

~Victor