Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him. (1 John 2:15 KJV)
Faith is a Lifestyle
You root yourself in the Word of God by meditating on, His law or Word day and night. When you read His Word, you have to believe what He promises you. You already have some faith in you, do not fear or doubt God. All of us can be fruitful always just like each fruit bears at its right season. You HAVE to live by Faith, there's no two ways about it.
So then faith comes by hearing, and hearing by the Word of God. (Romans 10:17 NKJV)