Ignorance is defined as a lack of knowledge or information.
Paul, on multiple occasions throughout the Bible, says something to the effect of, “I do not want you to be unaware/uninformed” about mysteries of the Gospel, about spiritual gifts, about God’s works, about actions and events in his and his companions’ lives, etc…
There is a common saying in society, “ignorance is bliss,” which is a way of conveying the idea that if you don’t know about something you aren’t worried or anxious about it, and that it can be better to be ignorant and happy than informed and scared.