Titus 1:15-16 Everything is pure to those whose hearts are pure. But nothing is pure to those who are corrupt and unbelieving, because their minds and consciences are defiled. Such people claim they know God, but they deny him by the way they live. They are despicable and disobedient, worthless for doing anything good.
Actions put meaning to words. How we live matters. How we live reflects what is in our hearts. For those who have pure hearts, all that they do and say will be consistent with their purity. It doesn’t mean we will be perfect little angels, but it does mean we will consistently live what we profess to believe. The character of Christ will be evident in our lives. Our words and actions will be honorable and pleasing to Him.
The issue is what does purity mean as it is fleshed out in our lives? I believe it means a lot of things and probably will vary from one person to the next, but one thing that all pure people have in common is the desire to live submissively and obediently to Christ. It is wanting to be like Christ in character and nature. It is striving to win the battle over sin. It is staying connected to Christ at all times. It is understanding that apart from Christ ruling our hearts, we can do nothing that is pleasing and acceptable to Him.
A pure heart has a real problem with sin. Sin is repulsive and an effort is made to avoid it. A pure heart is moved to repentance when one stumbles and falls into sin. It is guilt ridden over sin. It is always looking to be more holy before God.
If you don’t have a pure heart, everything you say and do is defiled in God’s eyes. You may look good on the outside, but inside you are a mess. A defiled heart is an outcast; there is no place in God’s kingdom for him. No matter how it may appear, all the work of a defiled heart is worthless and does nothing good for the soul. A pure heart makes a man good and acceptable to God.