2 Corinthians 1:19-21 Amplified Bible, Classic Edition (AMPC)
19 For the Son of God, Christ Jesus (the Messiah), Who has been preached among you by us, by myself, Silvanus, and Timothy, was not Yes and No; but in Him it is [always the divine] Yes.
20 For as many as are the promises of God, they all find their Yes [answer] in Him [Christ]. For this reason we also utter the Amen (so be it) to God through Him [in His Person and by His agency] to the glory of God.
21 But it is God Who confirms and makes us steadfast and establishes us [in joint fellowship] with you in Christ, and has consecrated and anointed us [enduing us with the gifts of the Holy Spirit];
Amplified Bible, Classic Edition (AMPC)
Copyright © 1954, 1958, 1962, 1964, 1965, 1987 by The Lockman Foundation
The AMPC gives the clearest translation of what occurs in those who believe and have received the Holy Spirit. Without His presence there cannot be agreement nor the anointing of the gifts to enact God’s will.
Because the Holy Spirit abides with us the Spirit of Truth can use us to utter truth. When we hear those truths the Spirit within us resonates with confirmation in the Spirit, “Yes and Amen”. This is one of the ways in which we come to hear by faith that we are in Christ and that others among us also abide in Christ.
2 Corinthians 13:5 English Standard Version (ESV) Examine yourselves, to see whether you are in the faith. Test yourselves. Or do you not realize this about yourselves, that Jesus Christ is in you?—unless indeed you fail to meet the test!
Not all of us are introspective and we need the help of others to see what is obvious to us which escapes them. When we hear a resounding “Yes and Amen” the fact that it is a strong Word may be an indication that we should say to the speaker, “That was the Holy Spirit speaking to me through you.” In this way we can encourage one another that we truly are children of God.