Who Will Replace Lord Buddha As Teacher When He Already Get Nirvana

There’s a question, if Lord Buddha already nirvana (pass away) who will be the teacher in this world? Lord Buddha said that, treat Precepts/Sila and Samsara as teacher. 以戒为师，以苦为师。

Following the Dhamma, not the person. 依法不依人。If we want to following dhamma, we should learn the Dhamma, not learn about the person who teach us.

Following the meaning, not the words. 依义不依字。If we want to get contact in Dhamma, we should understand the meaning of the words, not only reading the words.