Spirit and truth is only revealed to those who are Spiritually born again and are indwelled with the Holy Spirit. That is our connection with God and His Son Christ Jesus in whom make themselves very real to us. None of us knew anything of God and His Son Christ Jesus until we started having fellowship with them.
1Cor 2:9 But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.
1Cor 2:10 But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God.
1Cor 2:11 For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
1Cor 2:12 Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God