Psalm 119:36

Psalm 119:36 "Incline my heart to Thy testimonies" NAS

I Kings 8:58 Solomon's blessing over the assembly of Israel
"...that He may incline our hearts to Himself, to walk in all His ways and to keep His commandments" NAS

Incline: to stretch out; spread out; extend bend down; bent; bow

Psalm 119: We are asking God to stretch or spread our hearts in the direction of His Word. we must extend our hearts towards His word. Our heart must be humbled as we bow to His laws, we bend our hearts down and bow to His word in contrast to our hearts being lifted up in pride and arrogance. We must be obedient to God; but we need Him to draw our hearts; to incline the desire of heart to be for Him and His testimonies.
The carnal heart does not desire this, it desires the things of the world, so we must petition God to turn our hearts and to bend them towards His precepts.
We need Him to teach us, incline us, turn us to His Word: establish His Word in us.
This is why He has sent the Holy Spirit He is our teacher, He inclines us toward the Word and testimonies of God and reveals the Truth to us.
Psalm 119:37 "We can even ask Him to help us in turning our eyes from vanity" NAS
His job is to help us fix our eyes upon Jesus.