Trust in the LORD with all your heart and lean not on your own understanding; in all your ways acknowledge him, and he will make your paths straight. (Proverbs 3:5–6 NIV) 

That word ‘acknowledge’ there means to know God relationally. In everything you do, be in communion with God. That’s really what it means.

If you go out and do what you want to do, and that includes sleeping around and making immoral choices, then you are not acknowledging God in all of your ways. He is not a God of sin. This message is not designed for people who are trying to fulfill their fantasies or their sinful desires.

This is for people who are truly seeking God with all of their heart, soul, mind, and strength. They are seeking to know Him. They read the Word. They are falling in love with God more every day. Those people can do this. God gives them the desires of their hearts.

When you’re not really seeking Him, when He is not your first priority and you are not pursuing Him with everything you have because He is good and you want to know Him, then the desires of your heart may not be purely His. They may be your desires for the old things your flesh used to want—you know, bigger house, nicer car, better body, somebody to love you, somebody to fill your void. 

Well, God is your void filler. He is your house. You are His house. You have everything you need in Him, and there is nothing that you lack. Lack is not your portion when you are in Him. I think it takes a while after we begin seeking God for the desires of our heart to transfer from our old, worldly desires to His desires.

But once you are seeking Him and you really know who you are as His child, He puts His desires in your heart. He puts in you the desire to take care of orphans and widows. He gives you the desire to help people. He gives you the desire not to honk the horn and be mad at somebody who road-raged you or drove you off the road. He gives you the desire to offer freedom and forgiveness. He gives you the desires of your heart because He is placing His desires in your heart.

The more you seek Him, the more you find Him and the more He gives you His desires. When that happens, you’ll know. If the desire in your heart is to go out and smoke and drink, that’s not it, okay? You’ll know when it’s God’s desire. If you’re walking and you see someone and think, “I feel like I should give this person twenty bucks,” that’s probably God’s desire in your heart. He is going to provide the twenty bucks, and He is going to want you to give the twenty bucks away.

You hear, O LORD, the desire of the afflicted; you encourage them, and you listen to their cry, defending the fatherless and the oppressed, in order that man, who is of the earth, may terrify no more. (Psalm 10:17–18 NIV)