603. Since a lax conscience is a species of erroneous conscience, the rules given above as to the kind of sins committed in consequence of an erroneous conscience, apply also to the lax conscience (see above, 588 Sqq.). (a) When the laxity is concerned with the existence of sin, the conscience taking what is sinful for something lawful, he who follows such a conscience is guilty or not guilty according as his ignorance is culpable or inculpable (i.e., as he acts from a bad or a good conscience). Examples: The man who practises dishonesty, because he has cheated his conscience by sophistry into deciding that dishonesty is lawful; the child who uses profane language without realization of sin, because he hears his elders use it. But if the lax conscience takes what is sinful for a duty, he who disobeys it is guilty of sin. Example: The person who refuses to tell a lie when he thinks he ought to lie on account of a promise made. (b) When the laxity is concerned with the gravity of sin, the conscience taking what is mortal for venial sin, he who disobeys such a conscience is guilty of mortal or venial sin, according as his ignorance is culpable or inculpable (i.e., as he acts from a bad or a good conscience). Examples: A child who thinks that calumny or missing Mass is only a venial sin, because he sees grown up persons treat these things lightly; a person that, to solace his conscience, advises with lax associates who always approve of what he wishes to do or has done. 604. He who knows, or who has good reason to think, that his conscience is lax, should guide himself by the following rules: (a) with reference to the past, if there is a doubt whether or not sin was consented to or was grave, the presumption is against him, for laxity willingly contracted makes one responsible for what ensues; (b) with reference to the future, a person must make use of the means prescribed for one who is in danger of sin (see above, 258 sqq.), for a lax conscience places one in danger of sin. 605. Remedies Recommended for a Lax Conscience.--(a) The defect of will or character should be corrected. Example: The presumptuous should reflect on the justice of God, and recall that the broad way leads to perdition. Those in whom the wish is father to the lax judgment should make war on the passion that leads them astray. Those who have become lax through bad habits, should set about acquiring good habits, like that of going to the Sacraments frequently. (b) The error of the intellect should be corrected. Example: If a person’s religious training has been neglected, he should do what he can to get correct information and advice as to his duties. If one has been influenced by lax ideas or conduct, one should change one’s reading or associations.