The Pharisees pursued purity before God through obsessive observance of added rules yet left their hearts unchanged. Jesus demonstrates that external efforts without inner transformation fail to achieve the standard of purity. A broken spirit and a contrite heart please God more than ritual sacrifices. Life gravitates toward impurity unless vigilance and effort maintain cleanliness through regular action. External washings symbolize the need for moral conduct and heartfelt change rather than mere ceremony. Without change inside the nature remains filthy and returns to defilement through habitual sin. After the initial cleansing human nature persists with seeds of defilement that require ongoing removal through sanctification. Daily renewal of the mind transforms the person by putting off the old corrupt conduct and putting on the new man created in true righteousness. The heart must be guarded to prevent lapsing into old habits of evil thoughts and desires. God creates a pure heart through a protracted process that imparts a holy nature by His Spirit and unites the person with Jesus Christ. This cooperation through faith and obedience allows mortification of the flesh and prioritization of God in all things. Partial purification from former darkness and rebellion continues toward completion as God finishes what He starts. A pure heart seeks freedom from every defilement of sin and produces spiritual discernment to see God clearly both now and in the future Kingdom.

Repentance involves changing the mind about a matter. It is tied closely to baptism because one begins to change the way he thinks after hearing the true gospel and believing it. This initial change includes recognition, acceptance and belief of the true gospel along with making changes in one's life to conform to the new way. Emotion plays a part when deep sorrow reaches into the heart, mind and entire being upon realizing the harm done to God and His purpose. One repents not only of specific sins but of what he is that caused him to fall short of God's righteousness. Repentance is a continuing process of making changes over a lifetime to produce the fruit of the Spirit more consistently. It means changing one's whole life from sinner to saint and from worldly to godly. The change is to have the very mind of Jesus Christ by bringing every thought into captivity or control. Failure to continue this change throughout life can result in penalties because salvation hinges on ongoing repentance from dead works and overcoming in faith. Rewards for this change include the gift of the Holy Spirit, forgiveness of sin and the grace and acceptance of God as joint-heirs with Christ.

The mourning Jesus desires exhibits a softness of heart that is ready for change in a righteous direction. This mourning knows it has done wrong and is eagerly willing to have it cleansed into holiness. Godly mourning plays a positive role in producing the changes God desires to produce His image in us. A plea for God to create a clean heart and renew a steadfast spirit is one that God will not deny. If one is truly serious about overcoming and glorifying God, it is well worth the effort.