Mark 7:8 For laying aside the commandment of God, ye hold the tradition of men,
A tradition of men, such as the one mentioned in Scripture, would be the doctrine of Scripture alone, which gives all individuals the right to interpret Scripture any way they want. Thus, invalidating the God given rule that one must obey those He has put in charge of our souls, in the Church.
Hebrews 13:17 Obey them that have the rule over you, and submit yourselves: for they watch for your souls, as they that must give account, that they may do it with joy, and not with grief: for that is unprofitable for you.
Those who follow the erroneous doctrine of Scripture alone, replace God’s authority with their own and make Scripture say what they want it to say, rather than what God wills. Therefore, they claim that attending the Mass is unnecessary. Whereas, Scripture says that missing the Mass intentionally makes one God’s enemy:
Hebrews 10:25 Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.
26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
28 He that despised Moses’ law died without mercy under two or three witnesses:
29 Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
30 For we know him that hath said, Vengeance belongeth unto me, I will recompense, saith the Lord. And again, The Lord shall judge his people.
31 It is a fearful thing to fall into the hands of the living God.
And that is just one of the traditions of men, or should I call them, errors of men, that Protestants follow and whereby they replace God’s Commandment with their tradition.