Good weather is also a prelude to a good mood.

It means: good weather and good mood. The external environment will affect the inner mood.

There is a similar sentence: the lamp, with bright light, accompanies you whenever night comes, so unknown. Ordinary or gorgeous, it's all the same Lamps decorated with pearls and crystals can only be used for decoration to satisfy people's vanity. Compared with this, ordinary fluorescent lamp is lucky, because its lighting properties have not changed, just like some people in life are ordinary but real.

The objective environment will affect people's mood to a certain extent, for example, the moon on the fifteenth day will remind people of reunion.