The man in the image appears to be deep in thought, exhibiting a sense of contemplation or introspection. Specific facial and body language cues that support this interpretation include:

1. **Eyes**: They are slightly squinted, which often indicates focused attention or introspection. The direction of his gaze isn't directly at the camera or any other visible object, suggesting he's lost in thought or reminiscing.
 
2. **Mouth**: His lips are slightly parted and relaxed, not showing any strong positive or negative emotion. The absence of a clear smile or frown, combined with the other facial cues, emphasizes a neutral yet contemplative mood.

3. **Jawline and Chin**: The tension in the jaw and chin area, which can often be associated with stress or concentration, is not prominently visible. This suggests that his contemplation is more reflective than stressful.

4. **Facial Muscles**: There's a slight tension in the muscles around his eyes and forehead, indicating that he might be thinking about something of significance or trying to recall a memory.

5. **Body Posture**: Although most of his body is obscured, what we can see suggests a relaxed posture. His shoulders, for example, do not appear to be raised or tense, which would typically indicate stress or anxiety.

Regarding the genuineness of the emotion:
The displayed emotion seems to be genuine based on the coherence between different parts of his face. It's common for people to display insincere emotions by forcing a smile or a frown, but the more subtle and consistent cues here — such as the slight tension in the facial muscles, the relaxed mouth, and the focused eyes — are harder to feign.

In conclusion, the man seems to be genuinely lost in thought or contemplation, reflecting on something important or significant to him. The overall ambiance of the image, with the soft lighting and the backdrop of a serene river scene, further amplifies the mood of introspection.