Final answer:
The basic doctrinal principle highlighted in Doctrine and Covenants 76:40-41 is the Christian doctrine of atonement and universal salvation through Jesus Christ, reflecting the Mormon belief in Christ's sacrifice for all humanity.
Step-by-step explanation:
The basic doctrinal principle emphasized in Doctrine and Covenants 76:40-41, a text significant to the Mormons and part of the wider corpus of Latter Day Saint movement, relates to the universalistic elements of salvation through Jesus Christ. These verses state that Jesus "came into the world, even Jesus, to be crucified for the world, and to bear the sins of the world, and to sanctify the world, and to cleanse it from all unrighteousness; That through him all might be saved whom the Father had put into his power and made by him." This clearly underscores the essential Christian doctrine of atonement and redemption through Christ's sacrifice, indicating that all individuals have the potential for salvation, a concept tied to the Latter-day Saint's belief in the atoning sacrifice of Jesus Christ for all humanity.