'Secret' in the Bible

'Cursed is the man who makes an engraved or molten image, an abomination to Yahweh, the work of the hands of the craftsman, and sets it up in secret.' All the people shall answer and say, 'Amen.'

'Cursed is he who strikes his neighbor in secret.' All the people shall say, 'Amen.'

The secret things belong to Yahweh our God; but the things that are revealed belong to us and to our children forever, that we may do all the words of this law.