{What he hath seen and heard} (ho he(9372)aken kai (886b)ousen).
Perfect active indicative followed by aorist active indicative,
because, as Westcott shows, the first belongs to the very
existence of the Son and the latter to his mission. There is no
confusion of tenses here. {No man} (oudeis). There were crowds
coming to Jesus, but they do not really accept him as Saviour and
Lord ( 1:11  2:24 ). It is superficial as time will show. But "no
one" is not to be pressed too far, for it is the rhetorical use.