Whether you participate in a popular faith or take an independent course, whether you trust in divine creation or cling to stern physical objectivity, your notions about truth define the overall context of your life. In this sense, all of us are spiritual beings as we all have certain beliefs about truth. Even to trust nothing might still be considered part of a spiritual belief system.
Your spiritual growth is a built-in part of the process of human development. Truth, affection, and major power don't prescribe a certain spiritual doctrine, so there's lots of freedom to research a mixture of beliefs. However, the highest ideal for your spiritual doctrine is becoming intelligent.
If your beliefs don't fulfill the necessities of being intelligent at the very least, they can't be thought spiritually sound as they'd be as they'd be in violation of universal principles. If a spiritual doctrine yields to untruth, if it disconnects you from life, or if it breaks you, it infringes on the rules and will only lead you astray.
My goal isn't to convert you to abide by any particular practice but rather to help you bring greater conscious awareness to your current spiritual life.