The one belief that unites all Christians is the belief in Jesus Christ. Christians believe that the only way to achieve salvation is to believe that Jesus died and rose again in order to save humanity from its sins.
Christians believe that Jesus will one day return to earth.
Christians also believe in original sin (all humans are born with sin that was passed down to them from Adam and Eve).
Christians believe that there is a heaven and a hell.
Christians believe that the Holy Bible is the word of God.
Christianity is one of the beliefs on our planet earth,similar to all other religions christianity has it's major beliefs wich gives it the difference from other religions.
The five main Belifs in Christianity are.
1)There's only one god. Mantioned in the Bible (Isaiah 43:10; 44:6, 8; John 17:3; 1 Corinthians 8:5-6; Galatians 4:8-9)
This Belife is also present in other religions.
2)God is All Knowing (Knows all things in the whole unviers)(Acts 15:18; 1 John 3:20).
Simply because God is the creator of the Univers and eveything inside it.
3)God is one in three or a trinity (Matthew 3:16-17, 28:19; John 14:16-17; 2 Corinthians 13:14; Acts 2:32-33, John 10:30,17:11, 21; 1 Peter 1:2
4)God Is Powerful (Psalm 115:3; Revelation 19:6).
5)God is Present Everywhere.
These are the 5 major belifes of christianity.