I've certainly getting to some realisation about that in myself. What I think I know in theory, I generally don't, instead there's a bunch of narratives about myself I've constructed over the years that make me believe I know stuff, such as the nature of God for example. I'm convinced about it and get this grandiosity about my own sense of knowledge. I'm just starting to get how all that actually makes me disconnected from myself, others and the universe, the complete opposite of what I thought I was doing.
I get to see that when things happen in my life, mini crisises or breakdowns where I see I've been deluding myself for so long, and the experience starts wearing down all that self delusion Ive been clinging to. After I have a little more capacity to just get real about myself, and notice I feel more connected in a more real way than before.