Related to that is we can learn to wall off our thoughts to others and keep them private creating a false sense that we can think whatever we want without causing harm to others. This is clearly false. Despite any proficiency that we develop in sealing in our harmful thoughts, those thoughts will leak out in our actions, body language and attitudes. Thoughts determine what we become and who we drag down along with us, or who we lift up as we go along through life.
In Doctrine and Covenants section 64:29: "Wherefore, as ye are agents, ye are on the Lord's errand; and whatever ye do according to the will of the Lord is the Lord's business."
As manly men we are recruits of the Lord, consequently we are his agents and we need to do things his way. Of course we will take years to learn and hone those abilities, but if we know now an area we should change then we need to take steps to make that change or be held accountable not only for what we are doing and not doing, but for the good that making that change would lead to in our lives and the lives of others.
"As a man thinketh in his heart so is he." Proverbs 23:7