Often a memory will come to mind, and we get a glimpse of something we did. In that moment we might sense an incongruence.
We grasp for a sense of self, an idea that we had about who we were. That leads us to resist what actually happened. The inevitable result is suffering.
In fact, grasping and resisting are so closely related that we might say they are the same thing. To grasp for something we wish were true is to resist the reality.
In a single moment, we can let go of grasping, let go of resisting, allowing, embracing or even worshipping what we once were, and what we now are.