'Genuine' in the Bible

There it was—the true Light [the genuine, perfect, steadfast Light] which, coming into the world, enlightens everyone.

But a time is coming and is already here when the true worshipers will worship the Father in spirit [from the heart, the inner self] and in truth; for the Father seeks such people to be His worshipers.

For My flesh is true [spiritual] food, and My blood is true [spiritual] drink.

Then Jesus called out as He taught in the temple, “You know Me and know where I am from; and I have not come on my own initiative [as self-appointed], but He who sent Me is true, and Him you do not know.