The lightning that precedes the thunder is a common image of the warnings that come before calamity.

完全透析自己的本性---这是你我此生来走一遭的目的。

"The major threats to survival that our ancestors faced - predators, starvation, disease - left their mark on our fears and anxieties."

谁不付出就什么都得不到，最大的不幸不是没人爱，而是没有人去爱。