Helping others needs timely help, not adding insult to injury. Imitate what you want and pursue your ideal, not what you want. Receiving guests can neither

(The examples of "giving charcoal in the snow" and "adding insult to injury" in the title have the same word "snow", and so does parody. )

We should pursue our ideals with confidence, not doubt.

The pursuit of ideals should have a beginning and an end, not a beginning and an end

You can't be cocky or humble when receiving guests.

We should neither treat guests lightly nor care too much.