In Japan we have the phrase, "Shoshin," which means "beginner's mind." Our "original mind" includes everything within itself. It is always rich and sufficient within itself. This does not mean a closed mind, but actually an empty mind and a ready mind. If your mind is empty, it is always ready for anything. It is open to everything. In the beginner's mind there are many possibilities; in the expert's mind there are few.
Zen Mind, Beginner's Mind (ed. Shambhala Publications, 2010) - ISBN: 9780834821293