Nicholas of Cusa (1401 – 1464 CE) was a philosopher and mystic who read and supported Eriugena.  He argued that the known and unknown, the finite and infinite, dwell together in the forms of this world, using the example of a circle which is endless right in front of our eyes.  He also, like Jesus, used the example of a mustard seed.  Imagine a mustard seed, and that we have unlimited water, earth, space and light to give it to grow.  One seed is potentially infinite, with no limit to its growth through the number of new plants and seeds that it spawns.  Cusa argues that not only is the physical seed infinite, but so is the seed in our minds, in our imagination, showing that the mind is potentially infinite as well.