(b) Internal assent should be given such teaching--that is, the submission of the judgment of the individual to the judgment of the teacher who has the authority from Christ and assistance from the Holy Spirit. This internal assent differs, however, from the assent of faith, inasmuch as it excludes fear of error, but not of the possibility of error, and it may later on be suspended, called into doubt, or even revoked. Pope Pius X in his _Motu proprio_, “Praestantia scripturae Sacrae” (Nov. 18, 1907), indicated the binding force of the decrees both of the Pontifical Biblical Commission and of all doctrinal decrees: All are bound in conscience to submit to the decisions of the Biblical Commission which have been given in the past and which shall be given in the future, in the same way as to the decrees which appertain to doctrine, issued by the Sacred Congregations and approved by the Supreme Pontiff; nor can they escape the stigma both of disobedience and temerity, nor be free from grave guilt as often as they impugn their decisions either in word or writing; and this over and above the scandal which they give and the sins of which they may be the cause before God by making other statements on these matters which are very frequently both rash and false. (Reaffirmed by the Biblical Commission on Feb. 27, 1934.) 761. The objects, therefore, which formally or reductively pertain to the virtue of faith, are as follows: (a) Divine faith has for its object all the truths revealed by God as contained in the Canonical scriptures approved by the Church, and in the teachings received by the Apostles from Christ or the Holy Spirit and handed down to the Church as Tradition. Private revelations in exceptional cases may also be the object of divine faith. (b) Catholic faith has for its object all the truths formally revealed in scripture and Tradition that have been defined as such by the Church. The definitions of the Church are either solemn (e.g., those given in the Creeds, _ex cathedra_ definitions of the Popes, decisions of Ecumenical Councils) or ordinary (e.g., those contained in the universal preaching, practice or belief of the Church, encyclical letters [see _Humani Generis_, n.20]). Equivalent to definitions are the condemnations of error opposed to revealed truths.