Psalm 51:10 Create in me a clean heart, O God; and renew a right spirit within me.

Create something: means to form something from scratch.
Definition of heart is : our inner life, intention,mind , character, will,
Also means ” desire decisions ” that establish who we really are. “the soul or mind, as it is the fountain and seat of the thoughts, passions, desires, appetites,
Because God created man ,only He can create in man. So David is confirming that because God created Him He can create again in Him. David knows that He is a man, and To walk in and obey the will of God ,he needs God to create a clean desire, intention, mind set and will in Him.

When we ask God for jobs, money, understanding, strength He gives us. For david to walk in obedience with God’s will He asked God to create in Him a clean heart. He couldn’t do it on His own. This tells me if we are to continue to walk in God’s will we need to ask God to takeover our minds, our decisions and our desires.This means when we face situations which are in opposition to God’s word, God’s desire, will or intention will take over our desires.
We are to also believe what God word says, because we are in christ we are a new creation. David had to ask for God to create, but because Jesus came to die we automatically qualify and we are created again with God’s will and desire when we accept Jesus.(2 corinthians 5:17 Therefore, if anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new. 18 Now all things are of God, who has reconciled us to Himself through Jesus Christ, and has given us the ministry of reconciliation, )
But that does not mean we stop asking for God’s will and desire to take over ours. That does not mean we walk about our normal life and leave it there. (1 peter 5:8.Be alert and of sober mind. Your enemy the devil prowls around like a roaring lion looking for someone to devour)
We should keep praying for God’s desire to take over ours, to take control over us, worshipping Jesus and confessing God’s word over our lifes. Reading God’s word and asking for understanding and revelation.

The bible says: we should ask with faith, believing we have already got it. (Matthew 21:22 If you believe, you will receive whatever you ask for in prayer.”)Even more amazingly His word says
1 john 5:14
This is the confidence we have in approaching God: that if we ask anything according to his will, he hears us.and to walk in his obedience is God’s will.
God’s word is alive, His word does not return to Him void. (Hebrews 4:12 For the word of God is alive and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart).God created the whole universe with words. Thats why we are to confess God’s word over our lives instead of bad words. When we confess His words we are creating life in us and around us and shifting atmospheres. It says God’s word is active. Active means living and moving. There is power in God’s word.