a sad and lonely man sits pensively under a tree. man thinks about a problem. time for reflection. despair, depression or

man sitting leafless tree alone loneliness single concept memory nature silhouette background person design art symbol graphic lonely one sad mental depressed unhappy stress problem pensive worry emotion tired despair sorrow loss thinking frustration grief negative pain crisis distress exhausted fatigue psychology drawing black white illustration solitude landscape relax sits pensively under tree thinks about problem time for reflection depression hopelessness concept image varied