We should ever be learning about Jesus!
2 Timothy 2:15, Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
Our goal should be to be constantly learning about Jesus. Then, if someone were to ask us about a certain topic, we will be able to give them a Spirit filled answer. Lord willing, it will be an answer that will bring them under conviction of their sin.
Do you feel like you have learned everything there is to know about the Bible? Friend, you are so wrong! The Bible is the richest book that has ever existed. You will never exhaust the depths found in the Scriptures!