KJV:
Now I tell you before it come, that, when it is come to pass, ye may believe that I am he.
NASB:
"From now on I am telling you before it comes to pass, so that when it does occur, you may believe that I am He.
KJV:
Let not your heart be troubled: ye believe in God, believe also in me.
NASB:
"Do not let your heart be troubled; believe in God, believe also in Me.
KJV:
Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works.
NASB:
"Do you not believe that I am in the Father, and the Father is in Me? The words that I say to you I do not speak on My own initiative, but the Father abiding in Me does His works.
KJV:
Believe me that I am in the Father, and the Father in me: or else believe me for the very works' sake.
NASB:
"Believe Me that I am in the Father and the Father is in Me; otherwise believe because of the works themselves.
KJV:
Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater works than these shall he do; because I go unto my Father.
NASB:
"Truly, truly, I say to you, he who believes in Me, the works that I do, he will do also; and greater works than these he will do; because I go to the Father.
KJV:
And now I have told you before it come to pass, that, when it is come to pass, ye might believe.
NASB:
"Now I have told you before it happens, so that when it happens, you may believe.