Jesus is telling us that His Word and His HolySpirit enable us to abide in Him.

When He spoke these Words His HolySpirit had not yet been poured out.

He is preparing His disciples for a new state of existence which He was making possible for them and us.

That new state of existence is as NewSpirit beings who are filled with His HolySpirit, with minds transformed by His Word - as SonsOfGod.