If your talking about how A Psalm of Life comes to my mind. Well, when I encounter struggles I remember this.
But if your talking about what comes to my mind when I see or read the Psalm of life my answer is: Being positive in life. Looking forward with a smile. Making the most out of life. Not having doubts because we only have 1 life to live. And we shouldn't let our past or worries about the future bring us down. We encounter struggles to be worthy of what we have in life.