1 Peter 2:1-2

So put aside every trace of malice and all deceit and hypocrisy and envy and all slander and hateful speech; like newborn babies long for the pure milk of the word, so that by it you may be nurtured and grow in respect to salvation. 

The renewing of our mind is the best defense against the flesh and keeping our tongue under control. The word transforms our hearts, then what comes out of our hearts to others will be of love and not the flesh. The word’s pure milk is a transformer of the heart and renewal for the mind.