(advance)-(retreat)-(advance and retreat freely) (advance is retreat)
A good scholar should learn from others to make up for their shortcomings.
(long)-(short)-(complement each other)
3. At the beginning of life, the nature is good, the nature is similar and the habits are far away.
(near)-(far)-(He who has no long-term worries will have near worries)
4. If a saint cares too much, he will be lost. A fool who cares too much will gain something.
(lost)-(gained)-(lost and recovered)