Your second sentence, after the semicolon, is unintelligible.
Now, now, don’t cry like Bieber during the 2015 VMAs. We can fix this.
How do I know? Well, I begin with a k.
In all seriousness, I know because I’ve got now/know know-how. I mean it. If you could see my face right now, you’d be a Belieber.
Now, you see, is an adverb referring to the present; know is a verb denoting a sense of understanding. The distinction is common, um, nowledge.
In that five-word construction that follows the semicolon, your first now shines, but your second one isn’t too bright. If it had a k, it’d know better.
Now and know each need to appear, as Bieber belted in his debut song, “One Time.”
I need you, know.
I need you now.