KJV : Howbeit <1161> when <3752> he <1565>, the Spirit <4151> of truth <225>, is come <2064> (5632), he will guide <3594> (5692) you <5209> into <1519> all <3956> truth <225>: for <1063> he shall <2980> (0) not <3756> speak <2980> (5692) of <575> himself <1438>; but <235> whatsoever <3745> <302> he shall hear <191> (5661), [that] shall he speak <2980> (5692): and <2532> he will shew <312> (5692) you <5213> things to come <2064> (5740).
NASB : "But when He, the Spirit of truth, comes, He will guide you into all the truth; for He will not speak on His own initiative, but whatever He hears, He will speak; and He will disclose to you what is to come.
NASB# : <R>"But when<3752> He, the Spirit<4151> of truth<225>, comes<2064>, He will guide<3594> you into all<3956> the truth<225>; for He will not speak<2980> on His own<1438> initiative<1438>, but whatever<3745> He hears<191>, He will speak<2980>; and He will disclose<312> to you what is to come<2064>.</R>