The language of mathematics is the language of the universe, and by learning it, we can understand the cosmos.
数学的语言是宇宙的语言，通过学习它，我们可以理解宇宙。
You have to have confidence in your ability, and then be tough enough to follow through.
Life is too short to wake up in the morning with regrets.
Be a pro. Back up your back up. Have at least one physical backup and one backup in the cloud. Have more than one of each. How much would you pay to retrieve all your data， photos， notes， if you lost them？ Backups are cheap compared to regrets.