In the 20th century, R. Guardini spoke of a crisis of thinking. He was also able to show how this crisis is actually a crisis of belief. Trust in yourself and others is an essential element of knowledge. Is this argument still relevant and convincing in the age of AI? Do we need the religious dimension in scientific research? Can we really recognize the truth - regardless of the discipline - without contemplative knowledge? These are the questions that should help to show that spirituality is a key to new knowledge. We could speak of a trinitarian knowledge that is threefold. In ancient times, theory had a contemplative component, which then became more and more separated over the centuries. We cannot return to this way of thinking, but we can try to understand how theoretical knowledge, experiential knowledge and contemplative knowledge met without mixing and without being separated.