Abstract mathematical concepts can eventually be traced back to simple integers, which are traced back to an experience of things in the world (a toddler learns

Abstract mathematical concepts can eventually be traced back to simple integers, which are traced back to an experience of things in the world (a toddler learns to count 1, 2, 3). And it is precisely because higher mathematics is so far abstracted away from physical experience is the reason why many people struggle with it. Besides, many great mathematicians have explained their knowledge as an "experience" even "spiritual experience". Not all experiences are physical. Ramanujan described his experience of mathematics as lights and sounds and patterns, and this is common among geniuses. > you need some basic concepts Agreed. All basic concepts are an experience.