1 John 5:4 (NKJV)
If you asked people for their opinion about the best way to run or jog, you could have as many answers as you do people. People might talk about the clothes you should wear, the best brand of shoes, or even where the best place to run or jog would be. Sometimes people have all kinds of ideas what is necessary for someone who wants to run or jog on a regular basis, but most of the things people would mention are more in the area of style than substance. No matter what other things you might do, to be a successful runner, you have to run or jog.
If you asked Christians about how to live a victorious life, you might get a lot of different ideas. Some would tell you to pray many hours a day, others would tell you that reading and studying multiple chapters of the Bible on a daily basis would be the key, and others would talk about how someone needed to go to a special meeting or have some man or woman of God pray for you. But, in 1 John 5:4 we have the answer to living a victorious Christian life, we overcome by faith.
The Christian life is a faith life. We are saved by grace through faith (Ephesians 2:8), we are justified by faith (Romans 3:28), we live by faith (2 Corinthians 5:7), and we overcome by faith (1 John 5:4). Everything we do must be done by faith in God and His Word. We don't overcome in life because of anything in ourselves, but because of Jesus. There are many ideas about what it takes to live an overcoming Christian life, but the only way to overcome is by faith, based on what Jesus did for us as revealed to us in God's Word.