What is purity? The quality of thoughts, words and deeds determines the level of purity of a soul/person.
Pure thoughts - only good wishes to any and all living beings at any and all times. No matter what the other individual thinks, speaks or performs, you will have mercy for that soul and only good wishes for him/her.
Pure words - only words of wisdom will come out. In any situation, you will be perfectly under control, all sensory organs will obey the intellectual order, only required words, harmless words that will have only good or neutral impact will come out from the mouth.
Pure deeds - only good/neutral deeds will be performed. The thoughts and intention of a deed determine the quality of the task. Performing the tasks with neutral or good intention is desirable. The acts reveal the personality.
Beauty lies in mind and not body. This beauty comes from purity.
