'Declare' in the Bible

But when He, the Spirit of Truth, comes, He will guide you into all the truth [full and complete truth]. For He will not speak on His own initiative, but He will speak whatever He hears [from the Father—the message regarding the Son], and He will disclose to you what is to come [in the future].

He will glorify and honor Me, because He (the Holy Spirit) will take from what is Mine and will disclose it to you.

All things that the Father has are Mine. Because of this I said that He [the Spirit] will take from what is Mine and will reveal it to you.