It is like slowly drinking poison
I have heard over the years about how the saints over-emphasized their tendency to sin. That being close to God, sin should somehow not be an issue, a problem, or a struggle. One reason I believe, and this applies to me, is that it is difficult to understand the seriousness of even our smallest sins. That is because as stated above ““Every sin is a mockery of love”. That is hard to comprehend since sin is so common. Even unintentional sins, cause harm and wo