Sting has used good symbolism here when referring to the card games. Like gambling, life too has unpredictable ends it's only what you make it, the verse " know that the spades are swords of a soldier
I know that the clubs are weapons of war
I know that diamonds mean money for this art
But that's not the shape of my heart" illustrates the various selfish and dangerous paths you could pick in life but so long as you stick with your better judgement and have faith in yourself you won't fall victim to these pitfalls.
Sting has used good symbolism here when referring to the card games. Like gambling, life too has unpredictable ends it's only what you make it, the verse " know that the spades are swords of a soldier I know that the clubs are weapons of war I know that diamonds mean money for this art But that's not the shape of my heart" illustrates the various selfish and dangerous paths you could pick in life but so long as you stick with your better judgement and have faith in yourself you won't fall victim to these pitfalls.