"Don't forget your initiative, don't stick to it. What do you mean by "don't forget the agreement and live up to expectations"?

Don't forget your initial intention, don't insist. Don't forget the agreement and live up to expectations.

It means: No matter how far you are from your goal, no matter how many successes or failures you have experienced, don't forget your initial heart, your inner pursuit, and don't run counter to what you insist on. Don't forget your promise to others and don't live up to their expectations.

Expand:

Don't forget your initial intention: you can't forget your sincerity.

Live up to your persistence: live up to your persistence.

Don't forget the appointment: don't forget the previous appointment.

Live up to expectations: live up to the expectations of others.

It means that in the process of progress, people should not forget their true intentions, but should always stick to them.