观察
Challenges are opportunities in disguise—if you're willing to look closely.
The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil and no good, nothing but blind, pitiless indifference.
It is not enough to observe and experiment, theorize and calculate. One must also imagine.
The uniformity of the hybrids in the first generation, the dissimilarity in the second, are facts which cannot escape the attention of an accurate observer.