It means don't forget your initial heart and stick to your professional and moral bottom line.

Bacon casts the soul to keep the original heart, while Lide Shu Ren undertakes the mission.

Teaching for a living is one of the oldest occupations in human society. In social development, teachers are the inheritors and disseminators of human culture and scientific knowledge. For students, it is also the developer of students' intelligence and the shaper of their personality. Therefore, people give people's teachers the lofty title of "Engineer of Human Soul". In the process of education, teachers play a leading role. He is an educator, leader and organizer of students' physical and mental development. The quality of teachers' work is related to the physical and mental development level of the younger generation and the improvement of national quality, thus affecting the rise and fall of the country.