Complex sentence: Fourteen years after her husband's death she met the young Vivekananda in the spring of 1894 and was impressed by his demeanor and understood his depth of knowledge as she herself was deeply spiritual.
Split into simpler sentences: Fourteen years after her husband's death she met Vivekananda in the spring of 1894. She was impressed by his demeanor and understood his depth of knowledge, as she herself was deeply spiritual.