We all have doubts in our mind. It is a reflection of our insecurity, attachment and fear. Uncertainty surrounding the future increases it. When you close your eyes to meditate, it is possible that doubt conquers rational thoughts. It may even lead you to lose faith in meditation.
Remember that we tend to doubt the positive. There is rarely any doubt associated with negative acts or qualities. If someone says that he or she loves you, you may respond with a “Really?” But if the same person says, “I hate you!” are you likely to say, “Really?”
Recognize that doubt is a figment of your imagination. You will then be able to discard any doubt that arises during meditation.