Purity
When something is pure it is natural. When something is contaminated it is unnatural. So purity of the heart means to bring us back to our natural state of loving God.
The False Ego – Leads to Doom
The man who is puffed up with his material position and does not bow down before the Deity of the Lord, must know that his so-called turban or crown will only succeed in further drowning him in the water of the ocean of material existence.
Etiquette
Avoid material influence, degrading material influence. I pray to Srila Prabhupada that I can guide you properly.
Krishna
Krishna doesn't put you into anxiety. You put yourself into anxiety. Krishna simply makes you go through your course of karmic reaction.