Suppose I attempt to justify trusting my own thoughts with an argument. Suppose I read the argument and find it compelling. The very process of reading an argument (presumably written in English or some other natural language), understanding it, and having the experience of the argument "clicking" or "making sense" in my mind involves thoughts. But if I have no justification for trusting those thoughts, I wouldn't have justification for trusting the conclusion of the argument, that is, that my thoughts are reliable. Conversely, I would need to presuppose that my thoughts are reliable in order to trust my understanding of the argument leading to the conclusion that my thoughts are reliable, but doing so would be a textbook example of begging the question (i.e., circular reasoning). In fact, the very act of asking a question here on Philosophy Stack Exchange is also an instance of begging the question, as I need to act as if my thoughts are reliable enough to let me compose a sensible question on the reliability of my thoughts that other minds will be able to read, make sense of, and respond to.
How can I justify trusting my own thoughts without begging the question?