My Google quote of the day:

“Today’s scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality.”
– Nikola Tesla

For an otherwise very smart man, this is a really, really dumb statement. While we certainly need an experimental as well as theoretical approach to science, to say that the theory is a waste of time is complete nonsense. All valid science ultimately must be explicably described theoretically or we are admitting that we really don’t understand it at all.