Doubt is the voice that asks whether something is true, wise or possible. It can protect us from blind belief, and it can also freeze us when it never finds an answer. We doubt our decisions, our abilities, our relationships and our faith. Healthy doubt leads to inquiry. Unhealthy doubt keeps circling, drains confidence and leaves important choices undone.
The Gita welcomes honest questions. In Gita 6.33 and 6.37 Arjuna voices real doubts about how steady yoga can be and what happens to one who falls short, and in Gita 6.39 he turns to Krishna as the one who can remove them. Yet Gita 4.40 warns that persistent doubt joined with ignorance and lack of faith blocks peace and progress. Gita 4.41 says knowledge cuts doubt and frees one from bondage.
The way forward is to question and then act. Gita 4.42 urges using the sword of knowledge to cut doubt and then rising to perform one's duty with determination. Gita 7.21 adds that God strengthens every sincere faith, which encourages respect for others' paths. Ask your questions openly, study carefully, seek a reliable guide, and then make a decision and move forward with conviction.