"Man has made many machines, complex and cunning, but which of them indeed rivals the workings of his heart?"

This quote by Pablo Casals speaks to the complexity of the human heart and its capability to exceed even the most sophisticated makers developed by guy. It recommends that the human heart is capable of much more than any maker, and that its workings are much more detailed and powerful. Casals is highlighting the importance of the human heart and its capability for emotion, believed, and imagination. He is recommending that the human heart is a powerful force that needs to not be ignored. He is also highlighting the value of understanding and appreciating the intricacy of the human heart, and how it can be utilized to develop something beautiful and meaningful. By recognizing the power of the human heart, we can use it to produce something that exceeds even the most advanced makers.