Juan 14:17

Jesus now identified the Helper as the Spirit of truth (cf. John 15:26; John 16:13), that is, the truthful Spirit who would bear witness to and communicate the truth (cf. John 14:6; John 1:32-33; John 3:5-8; John 4:23-24; John 6:63; John 7:37-39).

"To be filled with the Spirit is the same as to be controlled by the Word. The Spirit of Truth uses the Word of truth to guide us into the will and the work of God." [Note: Wiersbe, 1:352.]

The unbelieving world cannot receive Him because it cannot see Him and knows nothing of Him. The disciples, on the other hand, knew Him because He empowered Jesus. He had been with them in this way as well as strengthening them occasionally as they needed help when they preached and performed miracles. However in the future, after Jesus returned to the Father, the Spirit would not just be with them but in them. This is another distinctive ministry of the Spirit in the present age. He indwells believers (Romans 8:9; 1 Corinthians 12:13). That ministry began on Pentecost when the church began (Acts 2:4; cf. Acts 1:5; Acts 11:15). [Note: See Johnstone G. Patrick, "The Promise of the Paraclete," Bibliotheca Sacra 127:508 (October-December 1970):333-45.] The Spirit does have a ministry to the world, but Jesus explained that later (John 16:7-11).