There is no absolute truth — each truth has its particular mission at a certain time. We talk of anthroposophy today, but we know that when we come to reborn in the future we shall hear something very different and stand in quite a different relationship to one another.
Let us cast our gaze back to a time when we were perhaps even then assembled together in some region of Northern Europe, where people gathered round a Druid priest who imparted truth to them in the form of myths and legends. If we had not heeded what he then said and if he had not influenced our souls, we should not be able today to understand the truth which anthroposophy now brings to us in a different form. When we are reborn, we shall hear the truth spoken in another and a higher form. Truth evolves, as does everything else in the world. It is the form of the divine Spirit, but the divine Spirit has many forms. If we thoroughly imbue ourselves with this characteristic of truth, we shall acquire a quite different relation to it. We shall say: Indeed we live in the truth, but it can take many forms.
Source: Rudolf Steiner – GA 95 – At the Gates of Spiritual Science – Lecture XI: The Post-Atlantean Culture-Epochs – Stuttgart, 1st September 1906