A second Greek verb spelled eikō (distinguished from the above) means to be like or resemble. It is related to eikōn (image, likeness) and appears in James 1:6 and 1:23, describing the unstable doubter who is 'like a wave of the sea' and the person who looks in a mirror.
James uses the comparison (eikō) to illustrate spiritual instability: the doubting person resembles (eikō) a wind-driven wave — moved by every circumstance, lacking the settled conviction of faith. Similarly, the hearer who does not do the word resembles a man who looks at his natural face in a mirror and immediately forgets. These comparisons call believers to the kind of stable, active faith that transforms the image-bearers of God into the likeness of Christ.