Alone, he had the freedom to make changes at will and with as little effort as it took to imagine the desired result. When other souls were watching, however, it became much more difficult. He guessed it was because any changes that he made, for example in raising a tower, were wreaking concomitant changes in the minds of all of the souls that were perceiving it.
Some very fine concepts I've had many times before, brilliantly stated.
