Final answer:
Martin Luther maintained that only two Catholic sacraments, Baptism and Eucharist, had scriptural basis; hence, these were the only two he retained in his teachings.
Step-by-step explanation:
Martin Luther only found enough evidence in the Bible to retain two of the seven Catholic sacraments, and they are Baptism and Eucharist. Martin Luther maintained that only two Catholic sacraments, Baptism and Eucharist, had scriptural basis; hence, these were the only two he retained in his teachings. These two sacraments were believed to be essential for the personal Christian faith that Martin Luther emphasized.
Luther's perspective was grounded in the belief that faith alone was sufficient for salvation and that the Bible was the sole source of authority for Christian practices and beliefs, leading him to reject other traditional Catholic sacraments like ordination, confirmation, marriage, the last rites, and penance. The teachings of Luther laid the foundation for the Protestant Reformation and significantly altered the religious landscape of Europe.