What is the nature of freedom? What is the most prominent characteristic of love? How does the spirit differ from the flesh? These are some of life's most puzzling questions, some of which have stood at the forefront of people's minds for generations. In the span of 2,000 years since the time of Christ, we have been riddled with existential conundrums that stand before us like a stone wall, creating an impasse that keeps us glued to old values. Yet Christ, in His great Wisdom, provided so many answers to life's troubles. In this series of lectures, Peter Deunov shows us how the words of Christ relate certain Truths that give meaning to our current modern existence, even in the midst of our great technological advancement and scientific breakthroughs. For the Truths contained here are eternal, and as such, they are in the condition to eviscerate the plague of nihilism that veils our current perceptions. Perhaps nobody understood Christianity as a science better than Peter Deunov. In the span of more than four decades he was able to disseminate and unravel the hidden meaning of Christ's words in such a way as to make them comprehensible and applicable in our modern age. It becomes more clear that the things Christ said in his time referred to us who live in the present age. Translated from the original Bulgarian, this collection of 32 lectures features Deunov's first official series, The Sunday Lectures, which began in March 1914. This was a special moment as it was the dawn of the so-called Age of Aquarius.