Selfish And Egoistic Thoughts of Mind
If we contemplate on bad, selfish and egoistic thoughts, the mind will force us to speak and act accordingly in due course of time.
The Laws of Karma
God made the laws of karma, and the soul made its own karma.
Disunity
It is Maya's greatest challenge to somehow or other disunite the devotees. As long as there is any impurity in our heart, Kali is going to try to manipulate that impurity to create an excuse for us to quarrel and fight, to sever the unity of our relationships so that we cannot work together to serve Srila Prabhupada and Krishna.
Marching Forward in The Great Battle Against Maya
As devotees, even if we may have weaknesses and faults, we are all fighting the battle together and sometimes one of us is weak and sometimes one of us is strong; and when you're weak I will pick you up, and when I'm weak you will pick me up; and in this way we will march forward together in this great battle against Maya.