But without a parable He did not speak to them. And when they were alone, He explained all things to His disciples.
When I was an atheist, I read the Bible from front to back. Very little of it made sense to me, but just enough did to bring me to Jesus. In Christ's day, He spoke many times to multitudes of people, but it wasn't the large crowds who understood His lessons, but the disciples.
The question could be asked why Jesus spoke in parables to the multitudes instead of speaking clearly. It's because of God's love for the people. The less understood about Jesus' words, the less strict their judgment would be. Jesus knew the multitudes were, for the most part, just interested in a show or being fed or seeing miracles. Though they heard Jesus' parables, they didn't approach Him about what they meant.
As for the disciples, they took the time to approach the Savior and ask Him specifically what He spoke of. Jesus said earlier (Mark 4:11) it was the disciples that would know the mysteries of the Kingdom, not those on the outside. Spiritual things are spiritually discerned, according to 1 Corinthians 2:14, so just like I couldn't understand much of the Bible without the Holy Spirit, the multitudes couldn't understand it without Jesus' explanation. If you're confused about a part of the Bible, pray and let God open up His Word to you.
Teach me, O Lord,
Pastor Ron Kitchell