This image contains no less than two compositional techniques I’ve previously discussed: a strong diagonal and symmetry.
They are important because they add harmony and balance to the photo.
(I’ll leave it to you to find their presence here.)
—Peter.
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↑Leica M9 and Leica Noctilux @ f/0.95.
Prosophos 
Beautiful shot!
Thank you Gage.
Awesome shot.
Would the diagonal be the line of the boy’s body going diagonal to the photo similar to the tree?
And would the symmetry be the branches of the tree and the “branching” of the kid’s legs?
Yes, and yes.
To be more precise, in the first instance the diagonal of the boy’s body is being completed by the top of the tree.
And in the second, you are correct, there is symmetry in the branching of the tree’s limbs and the boy’s legs.
Finally, the boy’s arm is mirroring the small tree branch that is mid-trunk and pointing towards the left.
—Peter.
Thats so awesome, yet you make it even more genius by applying the rule of thirds to the image too.
How do you think of all this in like a matter of seconds? Im planning on getting into photography soon, trying to learn from the best (Yourself and Steve)
Ha, ha, thank you for the compliment. Honestly, I practice, practice, practice. After a while you start to “see”, which is good, because — as you note — sometimes you only have a few seconds (or less) to make the shot.