Hare Krsna
Since the mind is always impure and flying here and there, even when chanting you can have evil thoughts, me I try to ignore them and carry on chanting, knowing that because of my impurity I cannot control my senses, but still sometimes the mind can be so obstinate that you think that you’ll never be purified, is this negative yes, another trick of the mind to engage you in sense gratification, or Maya I do not know, but what scares me are the thoughts which I do not want but are binded in me.