Be Filled with the Word
A clean sword is an awesome weapon in the hand of God. So, first of all, it’s a matter of constantly coming before the Lord to have your heart cleansed in repentance. And then you need to be in the word of God. You need to be in the word of God consistently because as David said, Your word have I hid in my heart that I might not sin against you. (Ps. 119:11). If you spend time in the word of God, it does its purifying work.
Or, as Jesus said, Sanctify them by thy truth, thy word is truth. (John 17:17) If you spend time in the word of God, it does its purifying work. An openhearted, constant repentance from sin and a heart filled with the deep riches of the word of God are means of grace. These are the tools that the Spirit of God uses to sanctify you. If you think you have an effect now without those things, it’s superficial. Step into that zone and watch what the Lord will do with your life on an eternal basis.