内弟子とは師と寝食をともにし、あらゆる武術のノウハウと秘伝を伝える制度だ。
Apprenticeship is a system where you eat, sleep and live with your master and are taught various martial arts know-how and secrets.

弟子達はイエスを信じた。
And his disciples put their faith in him.

その翌日。またヨハネは、二人の弟子と共に立っていた。
The next day John was there again with two of his disciples.

イエスも、また弟子たちも、その婚礼に招かれた。
And Jesus and his disciples had also been invited to the wedding.

トムの弟子でした。
I was Tom's apprentice.

仏心宗と呼ばれるのは、禅宗が文字や経典をたよらずに、仏の心を師匠から弟子へと直接伝えていくことを根本宗旨としているからです。
Zen Buddhism is also called "Buddha's mind school" because of its basic tenet of transmitting the mind of Buddha directly from teacher to student without relying on writings or sutras.

その棟梁は３人の弟子を従えている。
The master carpenter is accompanied by three apprentices.