Fear of darkness seems to be inherent in man. It stands for the way of evil.
Light dissipates darkness.
We need to follow the light and take action and walk.
Walking can indicate a lifestyle or progress.
(John 3:20 KJV) For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.
(John 3:21 KJV) But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
(John 1:4 KJV) In him was life; and the life was the light of men.
(John 1:5 KJV) And the light shineth in darkness; and the darkness comprehended it not.