part of the Confucian saying 三人行，必有我师焉 sān​rén​xíng​bì​yǒu​wǒ​shī​yān stating that one can always learn from others in a group

certainly; surely; inevitably; necessarily

there is; there are; to exist; to occur or happen

I; me; myself

(bound form) teacher; master; person who imparts knowledge or skills

(literary) a sentence-final particle expressing a state, a degree, or a certain mood such as affirmation or exclamation.