You have to understand what it meant to "know" in Hebrew culture. Just because I do not know something does not mean it does not exist. Life does not revolve around my understanding which is finite and but God who is infinite.Once I understood how Jews thought it is easy. The hard part is getting past our own culture and mindset to understand another.Is that a difficult concept to comprehend?
Before that time, the Bible explicitly says that Adam had not know evil.
God's love is beyond our comprehension does that mean it does not exist?