Teachers’ attitude of striving for excellence and their pursuit of perfection. A teacher is like a beam of light. Although the light is weak, it can shine very far.

"Teachers are ingenious and strive for perfection" means that teachers should uphold a rigorous attitude and pursue the state of perfection just like craftsmen; "Teachers are like light, reaching from the subtle to the distant" A teacher is like a beam of light. Although it is weak, it can illuminate the "road" far ahead. The overall meaning of this sentence is that the career of teachers may seem ordinary, but it has far-reaching influence. The teacher's light seems very weak, but it can accompany us throughout our lives.