Light.

The Light of understanding...

"The entrance of thy words giveth light; it giveth understanding unto the simple." Psa 119:130

The more the Word you get in, the more the understanding of things you get, and the brighter you shine! For this same reason, God says in Isa 60:1 to "Arise, shine; for thy light is come, and the glory of the LORD is risen upon thee." Whenever the light is turned on, the glory of the LORD is risen upon you!

"Shine your light" - simply means to show forth in speech and deeds, all you know and believe about God. The more the Word, the brighter the light, the more you understand, the more the glory. Therefore, let us shine our lights the more into this dark world(i.e, lacking the knowledge of God), revealing God's glory on the earth.

Light exposes darkness. 
Everyone walking in this Light is safe from evil, because they (i.e, the evil doers) simply can't come out in the open to attack you. We are securely safe in this Light. And the Word of God (ignited by His Spirit) is the giver of this Light. So the more we talk and walk in this Light, the safer it is for us, and not the reverse that the world is threatening. Therefore, let us not be afraid or ashamed of talking and walking in this Light, for it's the Only Safe Haven on earth.  

"No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the LORD, and their righteousness is of me, saith the LORD." Isa 54:17 . It is only with the understanding of the Word, we are able to condemn, because they have been brought under this Light.
Every evil plans lurking in the dark are exposed as soon as we turn on the Light! No wonder they hate Christ so very much, and even us.

Let us therefore seek and learn how to turn on this Light to lighten up our steps, and shine into every dark corners of our lives. It is well with us.