For everyone who does evil hates the light, and doesn't come to the light, lest his works would be exposed.
He that doeth evil hateth the light ... Wicked people are essentially night operators, being afraid of the light which could expose them.  Most crimes are committed in darkness, and the police force is always busiest at night.  Spiritually, the same principles hold.  Wicked and unspiritual people stay as far as possible away from any study or discussion of God's word.  If they attend worship at all, it is prompted by other considerations than a desire to know God; and for the vast majority of the wicked, worship services are absolutely off limits.