At face value you could take this proverb to mean there is a man who is deep, and he has got something to say but he is humble and he is quiet. He has a wealth of advice for you, but he is not going to press it on you, you have to seek for it.
Draw up our aspirations, have a look at them, examine them. Do not have anything vague going on in you. What do I want? What are my desires? What are my aims? Are they scriptural, or are they for me? Have I sought guidance? Do I bring them before the Lord in prayer? Are they really worthy of a Christian man or woman? You have got them, but have you drawn them out and looked at them so that your hopes and aspirations are purified and perhaps modified, perhaps made more humble and more fitting. That is the idea of the proverb. It says here that your dreams, your inner dreams and plans may be a very deceptive influence in your life, if you do not bring them to the surface and test them spiritually.