Avoid using stereotypical or clichéd images.
Do not use images that are offensive or disrespectful to any individual or group.
The images should not be boring or uninspiring.
The overall tone of the images should be avoided if it is negative or depressing.
Additional Details:

The images should evoke a sense of empathy and understanding for the different challenges and triumphs that people face on their metanoia journeys.
The images should be diverse in terms of the people's ages, races, genders, cultures, and socioeconomic backgrounds.
The images should show the power of metanoia to transform people's lives for the better.