Spotting an INFJ can be challenging as they are often private and reserved individuals. However, there are several key characteristics that can help identify an INFJ:

1. Deep Empathy: INFJs are known for their exceptional empathy and ability to understand the emotions and experiences of others. They can easily pick up on subtle cues and are often described as highly sensitive.

2. Intuition: INFJs rely heavily on their intuition and are often guided by their gut feelings. They have a knack for seeing patterns and connections that others may miss, making them excellent at reading between the lines.

3. Idealism and Values: INFJs are driven by their strong sense of personal values and a desire to make a positive impact on the world. They often have a clear vision of how things should be and are motivated to work towards creating a better future.

4. Introversion: INFJs are introverted individuals who gain energy from spending time alone or in small, intimate groups. They may appear quiet and reserved in social settings, but can be very engaging and passionate when discussing topics they care about.

5. Depth and Insight: INFJs have a deep inner world and are constantly seeking meaning and understanding. They enjoy exploring complex ideas and are often drawn to philosophy, psychology, and spirituality.

6. Emotional Sensitivity: INFJs are highly attuned to their own emotions and the emotions of others. They can easily become overwhelmed by intense emotions and may need time alone to recharge and process their feelings.

7. Altruism: INFJs have a strong desire to help others and are often drawn to careers in counseling, social work, or other helping professions. They genuinely care about the well-being of others and are willing to go above and beyond to support those in need.

8. Creativity: INFJs often have a rich inner world and a vivid imagination. They may express their creativity through various outlets such as writing, art, or music.

It's important to note that not all individuals will exhibit every characteristic listed above, and everyone is unique. However, if you notice someone who embodies several of these traits, there's a good chance they could be an INFJ.