1. To ensure observance of or obedience to a decision
2. To emphasize or reinforce an demand
Matthew 16:18-19 (AMPC)
"And I tell you, you are Peter [Greek, Petros—a large piece of rock], and on this rock [Greek, petra—a huge rock like Gibraltar] I will build My church, and the gates of Hades (the powers of the infernal region) shall not overpower it [or be strong to its detriment or hold out against it].
19 I will give you the keys of the kingdom of heaven; and whatever you bind (declare to be improper and unlawful) on earth must be what is already bound in heaven; and whatever you loose (declare lawful) on earth must be what is already loosed in heaven."
John 20:29-31 (AMPC)
"Jesus said to him, Because you have seen Me, Thomas, do you now believe (trust, have faith)? Blessed and happy and to be envied are those who have never seen Me and yet have believed and adhered to and trusted and relied on Me.
30 There are also many other signs and miracles which Jesus performed in the presence of the disciples which are not written in this book.
31 But these are written (recorded) in order that you may believe that Jesus is the Christ (the Anointed One), the Son of God, and that through believing and cleaving to and trusting and relying upon Him you may have life through (in) His name [through Who He is]."
1 Corinthians 15:14-17 (NKJV)
"And if Christ is not risen, then our preaching is empty and your faith is also empty. 15 Yes, and we are found false witnesses of God, because we have testified of God that He raised up Christ, whom He did not raise up—if in fact the dead do not rise. 16 For if the dead do not rise, then Christ is not risen. 17 And if Christ is not risen, your faith is futile; you are still in your sins!"
Philippians 3:10-11 (AMPC)
"[For my determined purpose is] that I may know Him [that I may progressively become more deeply and intimately acquainted with Him, perceiving and recognizing and understanding the wonders of His Person more strongly and more clearly], and that I may in that same way come to know the power outflowing from His resurrection [which it exerts over believers], and that I may so share His sufferings as to be continually transformed [in spirit into His likeness even] to His death, [in the hope]
11 That if possible I may attain to the [spiritual and moral] resurrection [that lifts me] out from among the dead [even while in the body]."