What evil intended as an ending can become material for a testimony.

Something done to you with the intent of ending your story can end up being the thing you speak from. That is not a reason to be grateful for the harm, and no one should tell you it was for the best. It is an observation that the intended ending sometimes turns out not to be the ending.

If you are far enough past something, notice what you understand now that you could not have understood before. Use it where it helps someone. Let that be your own, on your own timing, never an obligation.