It means to help people of all living beings get rid of suffering. People should have a kind and grateful heart and don't hurt others' hearts. Helping others to do good deeds can make you better and become Du Jie.
Crossing oneself and crossing others is the purpose of Mahayana Buddhism, which complements each other; Helping others is actually improving yourself; Improve yourself to help others better. People who only think about themselves are selfish. Only by thinking of others and lowering themselves can they surpass others.
Extended data
The enlightenment of this sentence:
The existence of fate, for people, is actually a constraint and a helplessness. Human nature likes freedom, and no one likes being bound. However, there are always various constraints in life, such as legal constraints, discipline constraints, moral constraints, community constraints and so on. Although these constraints have established social order and standardized people's words and deeds, they have also brought people a lot of troubles and helplessness.
In fact, human constraints not only come from reality, but also from "fate." People always feel that there are invisible ropes that bind people's hands and feet. No matter how hard they try, they can't give up their development and get what they want.