'Hidden' in the Bible

You are the light of the world. A city located on top of a hill cannot be hidden,

"Therefore do not be afraid of them, because nothing is hidden that will not be revealed, and nothing secret that will not become known.

At that time Jesus answered [and] said, "I praise you, Father, Lord of heaven and earth, because you have hidden these [things] from the wise and intelligent, and have revealed them to young children.

in order that what was spoken through the prophet would be fulfilled, who said, "I will open my mouth in parables; I will proclaim what has been hidden since the creation."

"The kingdom of heaven is like treasure hidden in a field, that a man found [and] concealed, and in his joy he goes and sells everything that he has and buys that field.