Updated: Aug 11, 2019
The proof of purity is the passion of your heart. Your deepest desires reveal the real you. Performance can be manipulated by emotions, emotions can be manipulated by circumstances. Reactions can be so varied depending on your rest or weariness or even the time of the day it is.
The passion of your heart is the real you. If your passion is Christlike, then that's pure, and that's love. If it's not, or if it's constantly changing, then you might consider coming to the cross and ask God to crucify you and cleanse your heart and make it pure as the blood of Jesus is able to do.
Our Heavenly Father can't wait to purify your heart and fill you with peace and joy.