“Fold” means turning something around itself, reducing its magnitude with whatever this implies in terms of its appearance and its content. The opposite is the concept of unfolding, that is, opening something, restoring its original size with whatever this implies in terms of its appearance of its content. Usually the folding refers to flat paper surfaces, older parchments or even to surfaces of other materials (fabrics, etc.).
In any case unfold means to reveal something gradually until I reach the desired approach of it. In this sense we unravel the secrets of nature through the observation with microscopes or the secrets of the universe through the observation with telescopes.
In the same way we unfold, explore, reveal, discover, establish the truths in our everyday life, and without this process of revelation through the opening and the approach of things, there is almost no progress, not only in science but also in the daily function of our lives. The unfolding, the revelation and the personal discovery of the truth of the living God is the basic principle of the operation of living faith.