How to be and stay transformed

Let God's word guard your heart
God knows that our hearts are naturally deceptive (Jeremiah 17:9-10). Give Him your heart and He will give you a new one (Proverbs 23:26, Ezekiel 36:26). How? "Let your heart retain my words", He says (Proverbs 4:4a). “If you abide in My word, you are My disciples indeed. and you shall know the truth, and the truth shall make you free.” John 8:31-32. This is how we can guard our hearts from which spring the issues of life.

Let God's word be your meditation all the day
We become what we think (Proverbs 23:7), that's why we need to constantly feed on "every word that proceeds from the mouth of God" Matthew 4:4. Let it be your "meditation all the day" until it is written in your heart, then it will become a delight to do God's will (Psalm 119:97, Psalm 40:8). We need to depend on God's word to live, just like how a new born depends on milk (1 Peter 2:1-3). Feeding on God's word, you'll find joy, knowing that His thoughts and ways are higher and seeing His word accomplished in your life (Jeremiah 15:16, Isaiah 55:7-11).

Wise in what is good, innocent concerning evil
We are called to have childlike humility, trusting the Lord with all our hearts and not leaning on our own understanding (Matthew 18:4, Proverbs 3:5). This  doesn't mean we should be gullible (John 10:4-5, John 10:27). We are called to be "wise in what is good, and innocent concerning evil." Romans 16:19. Search the scriptures, "which are able to make you wise for salvation through faith which is in Christ Jesus." 2 Timothy 3:15.

Spiritual Maturity and The Holy Spirit
We have to grow up from carnal infancy to spiritual maturity so that we can handle more "solid food" from God's word (1 Corinthians 3:1-4, Hebrews 5:12-14). Spiritually mature people don't put other people down, but bear each other's burdens, realizing that we all depend on Jesus who is everyone's Burden Bearer (Galatians 6:1-5, Matthew 11:28-31). Spiritual maturity (or being wise) comes from being constantly filled with the "oil" of the Holy Spirit (Matthew 25:4). The Holy Spirit doesn't speak of itself, but will testify of and glorify Jesus (John 16:13, John 15:26, John 16:14). It's also through the Holy Spirit that Christ can live in us (John 14:15-18, 23).

Crucifying selfish pride, realizing Christ is all you need
When our lives are centered in Christ, we have nothing to boast about except in "in the cross of our Lord Jesus Christ" Galatians 6:14. Selfish pride is spiritually fatal, it leads to thinking we have everything figured out, but it ends in destruction (Proverbs 16:18, Proverbs 14:12). Like Paul, we need to be determined to not know anything but "Jesus Christ and Him crucified" (1 Corinthians 2:2). We must remember, without Christ, we can do nothing (John 15:5). To bear the cross is to crucify the idea that you have to do something to save yourself or make God accept you, then realizing God loves you in spite of yourself and offers a new life to you through His son Jesus Christ (Matthew 16:24-25, John 3:16).

Dying to self daily and being renewed in the inner man daily
When we accept Christ's death as our own, we also receive His life (Romans 6:4-10). Then we will be dead to sin and alive to God (Romans 6:11). We will no longer live for ourselves, but live for Him who gave His life for us (2 Corinthians 5:15). We will be able to say like Paul, "I have been crucified with Christ; it is no longer I who live, but Christ lives in me; and the life which I now live in the flesh I live by faith in the Son of God, who loved me and gave Himself for me." Galatians 2:20. This isn't a one time event, we must die to self daily (Luke 9:23, 1 Corinthians 15:31).As we deny our old self, we must be renewed in the new inward man day by day (Ephesians 4:21-24, 2 Corinthians 4:16). "If anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new." 2 Corinthians 5:17

Keeping God in your knowledge
If we hear the word of Christ and believe in God who sent Him, then we have everlasting life. (John 5:24). Having eternal life is dependent on keeping God in our knowledge (John 17:3). It's only through God's Spirit that we can cast down "arguments and every high thing that exalts itself against the knowledge of God". 2 Corinthians 10:4-5. "When the enemy comes in like a flood, The Spirit of the Lord will lift up a standard against him." Isaiah 59:19. "I say then: Walk in the Spirit, and you shall not fulfill the lust of the flesh." Galatians 5:16