If you have dreamed about sleeping by a lake: Your instincts and imagination can broaden the horizons of others. Making inferences based on a few facts can cause emotional turmoil. Sleeping by the lake in a dream means that it will wear you down psychologically, a successful life and happiness. According to the Diyanet, it is a sign that a great fortune will come before him and that the things he fears will happen to him. For someone with a child, this dream signifies acting rationally, increasing wealth, working hard and making sacrifices.