The real challenge in computer science is not to write programs, but to understand the nature of computation.
计算机科学中的真正挑战不是编写程序,而是理解计算的本质。
Old minds are like old horses; you must exercise them if you wish to keep them in working order.
Ask anyone you admire: Their lucky breaks happened on a detour from their main goal. So embrace detours. Life is not a straight line for anyone.