The last sentence "not as good as a lamp in my hometown" means that a person is a stranger in a foreign land. No matter how round and bright the moon is, it is not as good as a lonely lamp in my hometown. It also means that no matter how wonderful the outside world is, no matter how good the outside world is, it is always worse than home!

The enlightenment of this sentence:

If you don't insist on picking it up, you don't care about putting it down. There is an indifferent attitude in life, which is called "anything is possible and nothing is the same". It can be understood as, yes or no. Refers to the attitude towards problems. If in some cases, it is not so persistent, then there is no problem of letting go. Many things are beyond your control. What you can decide is whether you work hard on one thing, but what you can't decide is what will happen in the end. All you have to do is do your part and learn to accept the result.

If the result is satisfactory to you, you should accept it gladly; If not, you still need to accept it gladly. Because you can't control the outcome of things, you can only do your best in the process.