"Perspective is to painting what the bridle is to the horse, the rudder to a ship." -Leonardo da Vinci
Perspective is what guides painting. PERIOD. Yet the statement is more complex than a superficial reading would have you realize.
Perspective is altered by emotions, imagination, recollection, and many other things. It is not a set-in-stone fact. Rather, it is a fluid, subjective position taken by an individual. That's how we can have people view the same thing and get completely different pictures.
When painting an image, it is the sole responsibility of the artist to take his or her perspective and translate it to the medium. Again, something seemingly more simple than it actually is. But with enough guidance, practice, and encouragement, perspective can be achieved.
Nothing is out of your reach or beyond your capability. You just have to be willing to work for it.
Hand-painted in Adobe Photoshop CC using the Wacom Intuos Pro and the Wacom Art Pen.