Many true statements can be said about just about anything. Thoughts and feelings, unless totally delusional, often have at least a toehold on something true. Often the error is in emphasis or significance, although sometimes the thoughts and feelings are assuming a version of reality that is just plain wrong.
However, to say that thoughts and feelings do not reflect reality or the truth is too broad. I’d rather say thoughts and feelings shouldn’t be considered the last word, or the whole story – they may have a basis in truth but dwelling on some truths can prevent us from seeing other truths.