Singularity is a point or region of infinite mass density at which space and time are infinitely distorted by gravitational forces and which is held to be the final state of matter falling into a black hole.
The word "singularity" has many different meanings, however. It all depends on the context. For example, in natural sciences, singularity describes dynamical systems and social systems where a small change may have an enormous impact.
So therefore its true, you really can be a change you want to see in the world.