How do you handle empathy in trauma work?

HOW, like actually how do those of you who work with heavy trauma think about empathy when the emotions and pain that clients feel are so intense? How do you allow yourself to connect with clients without being overwhelmed by it or taking it on in yourself session?

Im a very empathetic person, I have no problem seeing the world through the eyes of others, even when the events being described are so awful that the client’s mind barely remembers it.

Veteran therapists with experience in heavy trauma settings (crisis, rape, abuse, DV, etc.) encouraged to reply. What lessons did you learn along the way, and what techniques do you use to cope with the emotional load?