You only have to believe that Jesus died for your sins on the cross.
The salvation of mankind. By dying on the cross He saved humans from certain death and eternal hell with the condition that we must accept Him as the only way to attain heaven.
It is salvation and eternal life.
eternal salvation
If by 'basic' you mean theme or main idea, it is the 'Kingdom of God' that all mankind is invited to become part of via repentance and baptism. Jesus is our only path to eternal salvation.
God planned salvation for mankind , when the people refused to hear the warning words of the prophets, he then had to send his only son to earth to save sinful mankind.
Christians believe that Jesus saved mankind by sacrificing Himself on the cross to atone for the sins of humanity, offering salvation and eternal life to those who believe in Him. Through His death and resurrection, Jesus defeated sin and death, allowing believers to be reconciled with God and have the opportunity for eternal life in heaven.
Jesus mission was to bring salvation to mankind through His word. His teachings was that of love and salvation.
The Puritans referred to those predestined for salvation as the "elect" or the "chosen few" who were believed to be predetermined by God to receive eternal salvation.
eternal life , salvation, healing ect.
It is not necessary to salvation to pray to Mary. However, Mary can be a great help to a soul seeking eternal salvation.
You should believe in jesus as well as the scriptures , that is your choice , If you want eternal life and salvation or eternal hell.
Without Jesus who came to restore the relationship between God and man, the world and all mankind are lost in sin which is a dark place to be. Without accepting Jesus and his offer of salvation, there is no hope of eternal life with Christ in Heaven which is a place of light because of His presence. Rather, the only other option is eternal life in darkness, which is the absence of God's presence.