Depict a historical scene inspired by Acts 4:31, illustrating a group of people who, after their prayer, feel their surroundings shake intensely. They are simultaneously filled with a mystical force symbolizing the Holy Spirit and are actively engaging in fearless conversations, presumably about divinity and faith. Please express this scene using brush strokes, washes, and color blends typical of watercolor paintings. Ensure no use of text or words in the image.