what separate an average chess player to best chess player

Everything starts with the word dedication and experience with time. chess is a wonderful game that has many sides and an unorganized theory that takes intense dedication to understand. so as an experienced player who has a passion for chess. 
like example: a  player rating 1700 can see and understand the game better and clear than the one having rating 1500. the guy having a higher rating can calculate game more clear having 200 rating gap is big enough but the one who sees game deeper will win anyway.in that, the one who is sharped in tactics has more chances of winning. that a big gap buddy! an average player has limited planes and strategies as a high rating player can beat you in any game. according to me, practice is the key the more a person does practice at the daily routine and it becomes his habit than at his day no one can beat that guy.