The Diamond Sutra (Vajrachchedika Prajna Paramita Sutra) is an important work in the development of understanding how mind generates all of our perception and the nature of the truth of the Universe and Self. Most likely developed around the time of the other Prajna works (100-300 c.e.) in China, this easy to read sutra holds a lifetime of study.
“This existence is all a fleeting world, a star at dawn, a bubble in stream, a flash of lightening in a summer cloud, a flickering lamp, a phantom, a dream.” – Diamond Sutra
There are many decent translations available to purchase, or to read online: