Complex sentence: One opinion is that the red stands for courage, while the white stands for purity whereas another is that red represents the human body or physical life, while white represents the soul or spiritual life, together, standing for a complete human being.
Split into simpler sentences: One opinion is that the red stands for courage, while the white stands for purity. Another is that red represents the human body or physical life, while white represents the soul or spiritual life; together they stand for a complete human being.