Flying Stars (玄空飛星風水)

Understanding a Classic Phrase on Earth Qi

土者,氣之母,有土斯有氣
氣者,水之母,有氣斯有水

中央土,没方位,有水就有气,有气也意味着有土 (Maybe, in an imagery illustration is that below the ocean is seabed, seabed which is Earth holds the ocean. Energy of Earth resides in Water)