Jalāl ad-Dīn Muhammad Balkhī, aka Rumi, was a 13th century Sufi mystic and poet. He wrote in Persian, but has been widely translated. His wiki is here. These quotes barely scratch the surface, but should give you an idea about where his head was:
Can you find another market like this? Where, with your one rose, you can buy hundreds of rose gardens?
If all you can do is crawl, start crawling.
When you do things from your soul you feel a river moving in you, a joy. When action come from another section, the feeling disappears.
All religions, all this singing, one song. The differences are just illusion and vanity. The sun’s light looks a little different on this wall than it does on that wall, and a lot different on this other one, but it’s still one light.
Water the fruit trees and don’t water the thorns.
Keep knocking, and the joy inside will eventually open a window and look out to see who’s there.
Stop acting so small. You are the universe in ecstatic motion.
Work in the invisible world at least as hard as you do in the visible.
Why are you so enchanted by this world, when a mine of gold lies within you?
Sell your cleverness and buy bewilderment.