ELI5: Explain Like I'm 5

Trinitarian Universalism

Trinitarian Universalism is the belief that, in the end, everyone will go to Heaven no matter what their beliefs or actions. The term "Trinitarian" means that Christians believe in One God who is made up of three persons (Father, Son, and Holy Spirit). The term "Universalism" means that God eventually saves everyone. To put it simply, Trinitarian Universalists believe everyone will be given a chance to be forgiven for any wrongs they have done and will be taken to Heaven when they die.
Related topics others have asked about: