Not at all, you can find truth in anything, religious or not. Of course, the truth about religious things is that it's religious, and what we're talking about is it's just a thought or way of thinking.
Most people think of religious as any ideas that refers to the supernatural in some sense, but for me it would just be believing your thoughts are something other than thoughts. At best you have thoughts about how things truly are, which is a far cry from the truth as it actually exists. So you might have a religious person who likes to engage in that behavior, whereas a truthful person knows the difference. One lives in Thoughtland, one lives in truth, just things as they are.