My Answer: Your core truth is the core of who you are. It is that part of you that no one can ever take away. Your truth is beneath your wounds, your false beliefs, your codependency, your symptoms. It is the truth of who you are, connected with the source of life, your higher power. Your truth is all knowing. Inside your heart you hold the answers to everything you need to function. Your core truth is pure love, pure joy, pure bliss.
This truth can be hidden, but it cannot be destroyed. This is the hope of recovery, to find this truth buried on the inside of you, beneath the pain, the maladaption, the addictions and mental illness. The goal of healing is to find this truth in all its forms and manifestations and to live from it, rather than attaching to outside sources or from your wounded layers.
Those of us who suffer from codependency have not been taught to access our truth. We were taught to hide our truth, that our truth is nonexistent, that our cognitions and view of reality is wrong. We were invalidated. We were taught to mistrust ourselves and to give our power over to our caretakers (who were likely taught the same faulty way).
You can find your truth by being aware that you have a truth, and trusting that you do have truth inside of you. Your True Self. You may need a therapist to help you figure this part out, that is, how you feel, what you believe and whether your feelings are based in now or are pent-up emotions that are frozen inside.
When I did this process, that of unfolding my true self, it was one of the most magical part of my healing. I could literally picture my true self buried in the treasure chest of my heart, beneath the pain, anger, hurt and confusion. I pictured the real me banging on the sides of the box that held me down. I imagined myself unfolding and coming to life... which means, expressing and feeling my authentic truth for the first time.
It is an ongoing endeavor to locate your truth when you've gone through the things we've gone through. I learn new parts of myself every day that I never realized I had. Your truth holds things that you need to function appropriately in all facets of life. When you release bits of your truth from the captivity of hiding, suddenly you find that you're able to function in areas that you never could before.
As you go beyond your initial awakening and move into proper functioning you encounter lots of bleeps along the way. I now know that any issues or difficulties I'm having stems from my disconnection from my own truth. Lately I'm learning (through mindfulness) to listen to the voice inside myself. Not only to listen, but to HEED, validate and honor my gut instincts.