Mental Toughness, is it real?

Is Mental toughness real? I myself struggle with my own mental issues. I think we all do on some level. I do things now that scare me but then understand right away that it doesn't fit with my positive outlook in life. Hurt is a feeling that can impact a mental state. Especially for someone that was in your life for years. Your shoulder to latch on to when you needed it. Will I ever be fully ok? Time will tell.