I am not a Bible scholar, but the Church guides its followers on what is sinful and what is not. I’m not sure mortal and venial sin is referred to anywhere in the Bible, but as Catholics, we are supposed to obey the rules of the Church, and according to the rules, missing Mass is a mortal sin. Just as the case of not eating meat on Fridays a few decades ago was a mortal sin. There are other rules of the Church that are not mentioned in the Bible. I know there is someone out there who can answer this better than can I.
Here's a good lesson for you...
1Ti 4:1 Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;
1Ti 4:2 Speaking lies in hypocrisy; having their conscience seared with a hot iron;
1Ti 4:3 Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.
Doesn't it seem odd to you that the scriptures that your religion claims to have authored comes right out and condemns the practices of your religion???
The solution is to get into the scriptures and see what God says for Himself...
Thank you for your reply. Within your answer lies the reason I inquired about the Scripture base Catholic teachings.
For instance and still with respect, though it may sound impertinent,I just don't know how else to say this.
If I am correct in believing that a mortal sin condemns the sinner to damnation, then what happened to those who ate meat on Friday before the Catholic Church determined it was not a mortal sin? Are they still condemned - or redeemed?
Scriptural basis in their teachings is a must for any Church/Religion. To have otherwise may destroy the faith of the people and/or the credibility of the Church.