 To help overcome the noise and the doubts, here are three unwavering investing truths. Truth number one, there are always reasons not to invest. We all have investing concerns today, and emotionally, they make me feel like I should pull back or get more conservative. But the truth is, even though the reasons today might be unique, take a look at any time in history, and you'll find a handful of very real, very concerning reasons why you shouldn't have invested back then either.