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In Bible times, "interpreters" were rare people, they were seen as 'magicians' of some sort with gifted abilities to understand mysteries and interpret dreams that others could not. Men of calibre like Joseph and Daniel rose to the heights they did largely because of their gifts of accurately interpreting what others couldn't. Interpreters are equally needed today because God is speaking but many are not understanding the parables.
What is a parable and why parables? Parables are fictional stories that contain moral or spiritual lessons. God speaks to us in parables to make us search for Him and also to help us put the Spirit within us to work, trying to figure out a parable sharpens our intellect and develops us spiritually. When parables are figured out there is a reward and a honour that comes with it.
How are modern day parables communicated to us in our time? I believe God's parables are seen in our dreams and circumstances. People need to be sensitive to the hidden messages in their circumstances and dreams. Dreams should not be taken for granted, though dreams are not the most accurate way God speaks to us in our times. The most accurate way of knowing Gods will and ways is through the Bible. But God still speaks to us through dreams because He hasn't changed. But not all dreams are from God, for example, nightmares are not from God because they cause fear "God has not given us a spirit of fear but of power, love and a sound mind"
Job 33:15 proves to us God speaks through dreams. When we have dreams that are from God their interpretation is either literal or are in the form of a parable (it contains symbols and representations)
We need God's Spirit to accurately understand these night parables, for God's Spirit is the true interpreter. we are just receipients of what Gods Spirit is saying. God's Spirit also help us to perceive the hidden messages in our circumstancial parables and understand them. God's Spirit helps us to connect the dots in the hidden messages of circumstancial parables.
To accurately interpret dreams or night parables we need to have a good understanding of God's Word. God's Spirit and His Word work together, and there are stories, insights and applicable wisdom within the Word of God thats needed for the parable of our lives.
Dreams can also have literal interpretations (like the dream Jacob had that gave him a strategy to rise above His uncle Laban in business). Dreams with literal interpretations in my view are not as common as dreams thats are parables in their nature.