It is not possible to define. Nothing has ever been finally found out. Because there is nothing final to find out.

If there is a true universal mind, must it be sane?

Do unto others as you would have them do unto you, and you will make of their circumstances the litter you have made of your own.

I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while.

[Wise men] have tried to understand our state of being, by grasping at its stars, or its arts, or its economics. But, if there is an underlying oneness of all things, it does not matter where we begin, whether with stars, or laws of supply and demand, or frogs, or Napoleon Bonaparte. One measures a circle, beginning anywhere.

One can't learn much and also be comfortable One can't learn much and let anybody else be comfortable

It is not possible to define. Nothing has ever been finally found out. Because there is nothing final to find out.