If: equivalent to "if" and "if".
Mountains and rivers in my heart: mountains and water in my heart.
You see everything from your eyes: you can see everything from your eyes.
I will pray step by step: then I will pray for you step by step.
Extended data
"If the scenery in my heart is seen in your eyes, I will pray step by step." This sentence comes from an ancient singer Liu He's "Half-Potted Yarn".
Liu's Half Bottle of Yarn has Zen lyrics, elegant and smooth melody and elegant and calm singing, all of which contain an extraordinary clean energy.