Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.
我们对自然的观察必须勤奋，我们的反思必须深刻，我们的实验必须精确。我们很少看到这三种方法结合在一起;因此，有创造力的天才并不常见。