Observation and theory get on best when they are mixed together, both helping one another in the pursuit of truth. It is a good rule not to put overm… - Arthur Eddington

I hope it will not shock experimental physicists too much if I say that we do not accept their observations unless they are confirmed by theory.

We can see that, the constant in the law of gravitation being fixed, there may be some upper limit to the amount of matter possible; as more and more matter is added in the distant parts, space curves round and ultimately closes; the process of adding more matter must stop, because there is no more space, and we can only return to the region already dealt with. But there seems nothing to prevent a defect of matter, leaving space unclosed. Some mechanism seems to be needed, whereby either gravitation creates matter, or all the matter in the universe conspires to define a law of gravitation.

Never mind what two tons refers to. What is it? How has it entered in so definite a way into our exprerience? Two tons is the reading of the pointer when the elephant was placed on a weighing machine. Let us pass on. … And so we see that the poetry fades out of the problem, and by the time the serious application of exact science begins we are left only with pointer readings.

We have to build the spiritual world out of symbols taken from our own personality, as we build the scientific world out of the symbols of the mathematician.