Shri Ganesha is a purifying power that can't be contaminated. Purity is not limited to the gross side, but also includes clear thoughts. The human brain is like a pyramid, and when the mind elevates to the Brahmarandhra state, it goes through a tremendous change in reactions to the environment. Our innocence exists within us, but it's covered. Shri Ganesha can help us evolve the quality of Nirananda within us.