Upon converting to Jesus Christ (involving a sincere, wholehearted belief in Him), you can then change biblically (in ways the Bible prescribes and brings God glory) because of God’s divine power made available to you. This power is not of yourself.
This empowerment gives you a different purpose for living which provides a new source of focus for change.
This enabling then moves forward with a plan on how to change biblically. To put it simply, by obeying directives provided in God’s Word, the Bible.
So we see the source of every step is found in God. The conversion begins with Him and then empowerment is given from Him which breeds a new focus to effectually obey and we know how to obey from the “how-tos” provided in the bible which are God-breathed – again, from God.
Note: these how-tos go beyond mere action and focus most on how to think in ways that bring about right action that ultimately glorifies God.
Some verses for further study:
John 14:16-17; Romans 8:9; John 14:26; Romans 8:11; Romans 8:26-27; I John 2:18-27
Galatians 5:16-17, 22-23
I Thessalonians 2:13; Hebrews 4:12; II Peter 1:2-4; Romans 15:4; II Timothy 3:1-17
1 Corinthians 3:19; Isaiah 55:8-9; James 1:5; Philippians 4:11-13,19; Matthew 28:20
Luke 4:8; II Corinthians 5:9,20; Romans 8:29; Psalms 115:1; Romans 6:16-18
Philippians 1:6, 2:13; Luke 6:46-49, II John 1:6, Acts 5:28-29; Genesis 4:7; Ezekiel 18:20
Colossians 1:10; Matthew 7:1-5; Romans 12:2