Grave Sin Is Not Mortal Sin According To Ccc

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[indent]Catechism of the Catholic Church, Article 3 The Third Commandment, paragraph 2181 states:[/indent]
[indent][color="#0000FF"]2181 The Sunday Eucharist is the foundation and confirmation of all Christian practice. For this reason the faithful are obliged to participate in the Eucharist on days of obligation, unless excused for a serious reason (for example, illness, the care of infants) or dispensed by their own pastor.119 Those who deliberately fail in this obligation commit a [b]grave sin[/b][/color]. [/indent]

[indent]May we know why 'grave sin' is used and not 'mortal sin' as defined in Article 8 of CCC.[/indent]

[Laudate_Dominum]

The term "grave sin" is a synonym for mortal sin. This may be because part of the criteria of mortal sin is that it involves "grave matter".

At times the terms "serious sin" and "grievous sin" may be used as synonyms for mortal sin.

In certain contexts the term "grave matter" may actually be used in a way synonymous with the common usage of "mortal sin".

The Catechism, the Code of Canon Law, and other texts quite frequently use the terms "grave sin" and "mortal sin" interchangeably. The other possible synonyms are less common.