'In the Light' in the Bible

What I am saying to you in the darkness, speak ye in the light; and what ye hear in the ear, preach on the housetops.

Wherefore, whatsoever ye said in the darkness shall be heard in the light; and what ye spake in the ear in the inner chambers shall be proclaimed upon the housetops.

but, if we walk in the light, as He is in the light, we have fellowship with One another, and the blood of Jesus His Son cleanses us from all sin.

He who says that he is in the light, and hates his brother, is in the darkness even until now.

He that loves his brother abides in the light, and there is no occasion of stumbling in him.