In the fourth verse, Paul noted that “fables and endless genealogies” bring disputes and strife. They are to be avoided. In contrast, the intention of God’s commandments are to promote love. The two great commandments are to love God and love your neighbor. God has established this as a primary principle. All that is required from Him leads to these two things. A love for God and for man characterizes the true Christian. So, a keeping of the laws of God leads to love, not strife.
In order to attain the objective of love, out text indicates that our hearts must be pure. The word pure indicates a heart that is clean, free from corruption. This is especially true with regard to motivation. Also needed is a good conscience. In effect, a man who consistently does what he thinks is right, and avoids doing what he thinks is wrong. Finally, it requires a sincere faith. Faith that is genuine. These are the prerequisites of God’s law bringing about love.
Without these we are ineffective, lacking in understanding.