Our sole belief is Jesus and Christ and him only we trust.
In John 3:18 The scripture said whoever believes in him is not condemned, but whoever does not believe stands condemned already because they have not believe in the name of God's one and only son.
Peter in Acts 4 stood up firm on the name of Jesus Christ because he is our firm foundation, The Sadducees, ordered them not to speak in the name of Jesus Christ but the disciples did not listen to them, In Acts 4:2 "Being grieved that they taught the people, and preached through Jesus the resurrection from the dead, And they laid hands on them, and put them in hold unto the next day unto : for it was now eventide. Howbeit many of them which heard the word believed; and the number of the men was about five thousand." In Christ we live and die because the bible says we must obey God rather than men.
Peter and the other disciples were threatened, beaten but they did not compromised christ words. our belief is in the uncompromised words of christ, which builds faith. The bible says in Romans 10:17 "So then faith comes by hearing and hearing by the word of God, the authenticity of God's words build faith, it restores, corrects, saves and delivers us from the hands of evil.