Emotions over a lifetime

Life is a succession of emotions, joys, surprises and pains,.
The first picture, on the top left, represents the one who discovers, he looks and is silent.. The second picture, at the top right, represents the happy period : smile, malice and serenity.. The third one illustrates sadness and renunciation. and what about the fourth? Perhaps the fear of the future that darkens in a such difficult world…