People really want to understand the difference between religious and spiritual. Spirituality is something internal whereas religion is something external.
When you start probing into yourself about the meaning of your life, who you are? and why do you live this life?, you have started feeling spiritual, Self awareness is the first step towards spirituality. Being aware of yourself and your karma is a wonderful experience to have in your life. Once you understand your karma, your soul will continue its journey in a peaceful way.
Religion is nothing but a set of structured systems and theories which induce the thinking of spirituality. It helps you to find the right questions to ask about yourself and find the appropriate answers. The difference between religion and spirituality is simply that most religions offer a specific set of beliefs and structures to help people to attune to their innate spirituality. The difference between religion and spirituality is in form only, for the true essence of all spiritual and religious practices is God.
For being spiritual, you don't necessarily need to attach yourself with a religion. When you find it difficult to attain the self awareness by yourself, the religious lectures by the Guru's can help you to do this. Most of us want to be wiser, more compassionate, more aware, and have more meaningful lives and religion try to address these desires.
If you are spiritual person, you can see the truth in all religions. If you are spiritual, you can enjoy all the good concepts provided by all religions in this world. All are different paths to the same goal and all religions stem from the same source.