As an individual human process, all thinking is independent. However, thought content is recombined or integrated stored data and impressions, from external sources.
Find moments of solitude which allow deep reflection. Explore your gifts of both reason and creativity. Discover truths that are uniquely yours. Allow yourself to celebrate, accept, and promote reality and the logic of evidence. Challenge cultural assumptions. Be aware of the potential for groupthink, in which group members try to minimize conflict and reach a consensus decision without critical evaluation of alternative viewpoints. (See Consensus Decisions.)
Charismatic people are persuasive, but may be exploiting your interest and attention for personal gain. Seek solid evidence for the truth of their dogma, or ask that they demonstrate the validity of their claims.
Develop your own capacities for rational thought, meditation, and coping. Explore your ability to be moral and ethical without spirituality, mysticism, religion, or worship. Thinking independently, use your innate logic to define your values. Translate your values into strategies which contribute both to your well-being and a better world.