The late Professor Pierre T. Kabamba advocated for pithy limericks that captured momentous research. The following admonishment was posted on his office door for graduate students of control and dynamical systems to appreciate:
The world is nonlinear, 'tis true.
But fear not, for here is a clue.
When signals are small,
And stable ov'rall,
xdot = A x will do!
Inspired by the above, the following limericks capture our major advances.