We live at the mercy of our emotions. It influences and shapes our desires, thoughts, behavior and destiny.
A good example is the best sermon.
The Rotten apple spoils his companion.
It should be the highest ambition of every American to extend his views beyond himself, and to bear in mind that his conduct will not only affect himself, his country, and his immediate posterity; but that its influence may be co-extensive with the world, and stamp political happiness or misery on ages yet unborn.
You have an all-encompassing true source of power available to help you reach the purpose of your creation. This is the power of God, exercising a subtle and loving influence in the lives of His children, lifting you and keeping you aloft. It is manifested as the Light of Christ, the Spirit of Christ, the Spirit of God, the Holy Ghost, and the gift of the Holy Ghost.
The Latin source of the word comforter--com fortis--means "together strong." As the Holy Ghost visits your own spirit, you become stronger than you are by yourself. When you receive the Holy Ghost, you receive strength, power, peace, and comfort.
"We shall prosper and build up Zion upon the earth; for this is our mission, and the work of your mothers and daughters of Zion—the mothers now, and by and by the daughters, who will, in turn, be mothers in Israel. Great responsibility rests upon you. Upon you depend the training and the direction of the thoughts and the inspiration of the hearts of your children, for they drink into the spirit of their mothers, and the influence of the mother over the children is the most enduring impression that can be made. There is nothing so imperishable as the influence of the mother; that is when she is good and has the spirit of the Gospel in her heart, and she has brought up her children in the way they should go."
Be careful about your choice of friends. In today’s technological society, we may spend more time with nonhuman companions than we do with our peers. While we may be very careful about our human companions, sometimes we give little thought to the other companions that we allow to influence us. Media of any kind can be a very powerful social influencer. We have all been given three precious gifts for our mortal experience. These include our body, our agency, and our time. If Satan can entice us to use our time in unfocused or unproductive or, even worse, nonvirtuous pursuits and then deceive us into believing that if we do this in private our actions don’t affect anyone, he is victorious. “If there is anything virtuous, lovely, or of good report or praiseworthy, we [must] seek after these things” (Articles of Faith 1:13).
Seek the companionship of virtuous friends, not virtual friends. Remember, “virtue loveth virtue [and] light cleaveth unto light” (D&C 88:40). This is a relationship scripture. In your pursuit of friendships and an eternal marriage partner, you cannot just make a list of all the qualities you are looking for in another or in an eternal companion. You must be your list at all times and in all things and in all places.
"No matter what circumstances you sisters experience, your influence can be marvelously far-reaching. I believe some of you have a tendency to underestimate your profound capacity for blessing the lives of others. More often than not, it is not on the stage with some public pronouncement but in your example of righteousness and the countless gentle acts of love and kindness done so willingly, so often on a one-to-one basis."
Satan will be bound by the power of God; but he will also be bound by the determination of the people of God not to listen to him, not to be governed by him. The Lord will not bind him and take his power from the earth while there are men and women willing to be governed by him. That is contrary to the plan of salvation. To deprive men of their agency is contrary to the purposes of our God.... Satan only gains power over man through man's exercise of his own agency; and when Satan shall be bound, as the Lord says he will be for a thousand years, one of the grant powers that will help bring this to pass is man's agency.... If Satan, therefore, has power with man, it is because man yields to his influence.... Every Prophet who has looked forward to our day has seen and predicted that the wicked would be destroyed. Their destruction means the destruction of Satan's power. The righteous will be left, and because of their righteousness the Lord will have mercy upon them; they, exercising their agency in the right direction, will bring down His blessings upon them to such an extent that Satan will be bound.
The Devil cannot exercise his influence over us, only as we permit him to do so.... In the first place the spirit is pure, and under the special control and influence of the Lord, but the body is of the earth, and is subject to the power of the Devil, and is under the mightly influence of that fallen nature that is of the earth. If the spirit yields to the body, the Devil then has power to overcome the body and spirit of that man, and he loses both..... When you are tempted...stop and let the spirit, which God has put into your tabernacles, take the lead. If you do that, I will promise that you that you will overcome all evil, and obtain eternal lives.