It is certainly simple to God and it is also should be simple to us, when and if we have the mind of God, but as we can see by the disagreements occurring on this forum it is not so simple to every man all of the time. To take our next step in the Lord, we need Light, which why without Him we can do nothing. Without Him we cannot see:Simple. Jesus is the light of the world and the Holy Spirit is the teacher that will lead us into all truth. When I am studying scripture, I do not ask Jesus what it means, I ask the Holy Spirit to show me the meaning of the words.
As we are to be like Jesus it follows that we are to be light.
"Thy word is a lamp unto my feet, and a light unto my path." Psalm 119:105