Monks, a Noble Disciple who possesses four things is a Stream-Enterer, no longer bound to the nether world, fixed in destiny, with Enlightenment as his destination.
What four?
Here, Monks, a Noble Disciple possesses confirmed confidence in The Buddha thus: The Perfectly Enlightened One is an Arahant, perfectly Enlightened, accomplished in true wisdom and conduct, fortunate, knower of the worlds, unsurpassed leader of persons to be tamed, Teacher of heavenly beings and humans, The Enlightened One, The Fortunate One.
He possesses confirmed confidence in The Teachings thus: The Teachings are well expounded by The Perfectly Enlightened One, directly visible, immediate, inviting one to come and see, applicable, to be personally experienced by the wise.
He possesses confirmed confidence in The Community thus: The Community of The Perfectly Enlightened One’s disciples is practicing the wholesome way, practicing the straight way, practicing the true way, practicing the proper way; that is, the four pairs of persons, the eight types of individuals - this Community of The Perfectly Enlightened One’s disciples is worthy of gifts, worthy of hospitality, worthy of offerings, worthy of respectful salutation, the unsurpassed field of merit for the world.
He possesses the virtues dear to the Noble Ones — unbroken, untorn, unblemished, unblotched, liberating, praised by the wise, not misunderstood, and leading to concentration.
A Noble Disciple, Monks, who possesses these four things is a Stream-Enterer, no longer bound to the nether world, fixed in destiny, with Enlightenment as his destination.
(Reference: SN 55.2)
In this Teaching from Gotama Buddha, he shares expanded Teachings to explain that a Practitioner who has attained the first Stage of Enlightenment will have confidence in The Buddha, The Teachings, and The Community while also practicing “the virtues dear to the Noble Ones”.
(1) Here, Monks, a Noble Disciple possesses confirmed confidence in The Buddha thus: The Perfectly Enlightened One is an Arahant, perfectly Enlightened, accomplished in true wisdom and conduct, fortunate, knower of the worlds, unsurpassed leader of persons to be tamed, Teacher of heavenly beings and humans, The Enlightened One, The Fortunate One.
The Buddha is explaining that his mind is “perfectly Enlightened” which is how we refer to a Buddha. Because a Buddha attains Enlightenment through their own independent journey, their mind is described as “perfectly Enlightened”. Their mind is uninfluenced by any outside source and is a main reason why they have deep “true wisdom” to guide countless beings to Enlightenment. Their moral conduct is exceptional in that they are deeply practicing The Teachings they share making them an “unsurpassed leader of persons to be tamed” or in other words, trained.