According to Osho, logic is not absolutely useless; it is valuable within its proper domain. For dealing with matter and scientific inquiry, logic—whose lifeblood is doubt—is indispensable. But in exploring consciousness and religion, doubt obstructs; you need trust. Don’t drag logic beyond its boundaries. Keep logic for science and trust for inner realization; then both can harmoniously coexist.
Use logic for things and science, but to know your own awareness you need trusting silence, not arguments.