Apparently, the old saying “seeing is believing” doesn’t always hold true, The people had seen the miracles Jesus had performed, but it still was not enough to convince them of the truth of Who He really was. They said,”We know His mother and father”, so how can a human claim to be the Son of God and that He came down from heaven? Jesus said “stop complaining….”. You can’t come to me unless you are drawn and you can’t know the truth unless you are taught by God. How can this be? How can we be taught by God? This is the work of the Holy Spirit, the third person of the Trinity. It is His job to “guide us into all truth”. We haven’t seen God and we can’t see the Holy Spirit, but we can know that He calls us and abides in us, if we accept that invitation to come to Jesus. Once we listen to the Holy Spirit (the Father) and learn from Him, we are children of the Living God. The gift of the Holy Spirit is the first installment that guarantees Jesus can and will keep us until He raises us up on the last day.
21 It is God who enables us, along with you, to stand firm for Christ. He has commissioned us, 22 and he has identified us as his own by placing the Holy Spirit in our hearts as the first installment that guarantees everything he has promised us.—2 Cor. 1:21, 22 (NLT)
6 And I am certain that God, who began the good work within you, will continue his work until it is finally finished on the day when Christ Jesus returns.—Philippians 1:6 (NLT)