A respectful and devotional Christian-themed watercolor style illustration depicting a symbolic contrast between the Spirit and the flesh. On one side, render an ethereal and luminous form, portraying the Spirit, in calm pastel hues. Opposing it on the other side, show a darker, earthy physical form representing the flesh, with its worldly desires. Signify the overcoming of the flesh by the Spirit with a cross. The composition should communicate the verses from Galatians 5:16-17,24 in a visually expressive manner, without any literal text or words.