A.T. Robertson Commentary John 7:4

"For no man doeth anything in secret, and himself seeketh to be known openly. If thou doest these things, manifest thyself to the world." — John 7:4 (ASV)

In secret (εν κρυπτω). See Mt 6:4,6 for this phrase.

Openly (εν παρρησια). "In public" (παν, ρησις, telling it all). See on Mt 8:32. Common in John (7:13,26; 10:24; 16:25,29; 18:20; here again contrasted with εν κρυπτω). It is wise advice in the abstract that a public teacher must allow inspection of his deeds, but the motive is evil. They might get Jesus into trouble. Ιφ θου δοεστ θεσε θινγς (ε ταυτα ποιεις). This condition of the first class assumes the reality of the deeds of Jesus, but the use of the condition at all throws doubt on it all as in Mt 4:3,6.

Manifest thyself (φανερωσον σεαυτον). First aorist active imperative of φανεροω.

To the world (τω κοσμω). Not just to "thy disciples," but to the public at large as at the feast of tabernacles. See 8:26; 14:22 for this use of κοσμος.