Some quotes from The Quantum and the lotus, by Matthieu Ricard & Trinh Xuan Thuan.
Since all is empty, all is possible
To see a World in a Grain of Sand
And a Heaven in a Wild Flower,
Hold infinity in the palm of your hand
And Eternity in a hour
Reality is what we take to be true. What we take to be true is what we believe. What we believe is based upon our perceptions. What we perceive depends upon what we look for. What we look for depends upon what we think. What we think depends upon what we perceive. What we perceive determines what we believe. What we believe determines what we take to be true. what we take to be true is our reality.
David Bohm (or Gary Zukav, depending on the source)
You may also want to look into the Langevin twin paradox.