Generate an ethereal watercolor illustration that depicts the essence of Luke 4:18-19 from the New King James Version bible. The visualization should include symbolic elements such as a figure preaching to humbly dressed individuals, healing a person's broken heart, providing liberty to people who seem captivated, aiding a visually impaired person to regain sight, and comforting those who appear oppressed. The setting should reflect a time that according to the biblical context would be 'the acceptable year of the LORD'. The artwork must reflect a respectful and devotional perspective towards Christianity and please avoid the use of any textual components within the image.