"In theory, there is no difference between theory and practice. But, in practice, there is"

This quote by Manfred Eigen is a humorous way of pointing out the distinction in between theory and practice. In theory, the 2 principles are the same, however in practice, they are often quite different. In theory, a concept may appear basic and uncomplicated, but in practice, it can be far more complicated and tough to implement. This quote is a reminder that although theory can offer a great starting point, it is typically necessary to adjust and adapt it to the real world. It also acts as a pointer that theory is not constantly adequate to fix an issue, and that useful experience and experimentation are frequently necessary to accomplish success.