The 5 senses of the body... Hmmm.... okay, the next time you see/hear/smell a fire in the building you're in, have fun believing it's not real. I, however, will believe the senses tha God made me with, pull the fire alarm and get the heck out. And the next time I feel the arms of my fiance around me in a hug, I will understand that he's showing me affection and comfort in a way God intended.
So when we're told to sing to God, are we supposed to believe that He doesn't really hear us? or how about when we pray? Does He not hear us in our voicing of both joy and anguish? We were made to experience this world around us and marvel in the wonders He created for us out of love.
As for good and evil and knowing God, God is with us at all times, helping us in our everyday lives because He loves us, so we have nothing to fear.
Psalm 23:4 Even though I walk through the valley of the shadow of death,
I fear no evil, for You are with me;