Bold ideas, unjustified anticipations, and speculative thought, are our only means for interpreting nature: our only organon, our only instrument, for grasping… — Karl Popper Copy Share Image
Theologians have felt no hesitation in founding a system of speculative thought on the teachings of Jesus; and yet Jesus was never… — Walter Rauschenbusch Copy Share Image
In practical life we are compelled to follow what is most probable ; in speculative thought we are compelled to follow truth. — Baruch Spinoza Copy Share Image
