Which Bible verse says 'out of the abundance of the heart the mouth speaks'?

The phrase "out of the abundance of the heart the mouth speaks" is found in the New Testament of the Bible, specifically in the Gospel of Matthew 12:34 and the Gospel of Luke 6:45. These verses are part of Jesus' teachings and emphasize the importance of the condition of one's heart, as it ultimately influences one's words and actions.

In Matthew 12:34, Jesus says:

"You brood of vipers! How can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks." (ESV)

Similarly, in Luke 6:45, Jesus teaches:

"The good person out of the good treasure of his heart produces good, and the evil person out of his evil treasure produces evil; for out of the abundance of the heart his mouth speaks." (ESV)

These verses highlight a profound truth about human nature and the spiritual life. Jesus is addressing the Pharisees in Matthew, calling them a "brood of vipers" to underscore their hypocrisy. Despite their outward appearance of righteousness, their hearts were full of evil thoughts and intentions. This principle is not just a critique of the Pharisees but a universal truth applicable to all believers.

The heart, in biblical terms, is considered the seat of emotions, thoughts, and intentions. Proverbs 4:23 advises,

"Above all else, guard your heart, for everything you do flows from it." (NIV)

This verse underscores the importance of maintaining a pure and righteous heart because it influences every aspect of our lives, including our speech. The words we speak are a reflection of what resides within us. If our hearts are filled with love, kindness, and truth, our words will naturally reflect these qualities. Conversely, if our hearts harbor bitterness, anger, or deceit, our speech will reveal these negative traits.

The concept of the heart's abundance influencing speech also aligns with the broader biblical narrative of transformation and sanctification. As Christians, we are called to be transformed by the renewing of our minds (Romans 12:2). This transformation is a work of the Holy Spirit, who changes our hearts and minds to align more closely with God's will. As our hearts are transformed, our speech and actions will also reflect this change.

The Apostle Paul echoes this sentiment in his letter to the Ephesians. In Ephesians 4:29, he instructs:

"Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen." (NIV)

Here, Paul emphasizes the importance of speaking words that are edifying and beneficial to others. This can only be achieved when our hearts are filled with the love and grace of God. The transformation of the heart is a continuous process that involves regular self-examination, repentance, and a commitment to spiritual growth.

To cultivate a heart that produces good and edifying speech, Christians are encouraged to engage in various spiritual disciplines. These include regular Bible study, prayer, worship, and fellowship with other believers. The Word of God is a powerful tool for shaping our hearts and minds. Hebrews 4:12 states:

"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." (NIV)

By immersing ourselves in Scripture, we allow God's Word to penetrate our hearts, revealing areas that need transformation and providing the guidance and wisdom necessary for growth. Prayer is another vital discipline that helps align our hearts with God's will. Through prayer, we invite the Holy Spirit to work in us, transforming our hearts and making us more like Christ.

Worship and fellowship are also essential for cultivating a heart that reflects God's love and grace. In worship, we express our love and adoration for God, which helps to keep our hearts focused on Him. Fellowship with other believers provides encouragement, accountability, and opportunities for growth. As we share our lives with others, we learn to speak words of love, encouragement, and truth.

The teachings of Jesus on the abundance of the heart and its influence on speech also have practical implications for our daily lives. In our personal and professional relationships, the condition of our hearts will be evident in how we communicate with others. Words have the power to build up or tear down, to heal or to hurt. By cultivating a heart filled with God's love and truth, we can ensure that our words bring life and encouragement to those around us.

Furthermore, the principle of the heart's abundance influencing speech can be a valuable tool for self-reflection. When we find ourselves speaking words that are unkind, deceitful, or harmful, it is an indication that there may be issues in our hearts that need to be addressed. This realization should lead us to seek God's help in examining and purifying our hearts.

In conclusion, the phrase "out of the abundance of the heart the mouth speaks" serves as a powerful reminder of the importance of maintaining a pure and righteous heart. As Christians, we are called to be transformed by the renewing of our minds and to cultivate hearts that reflect God's love and grace. Through regular engagement in spiritual disciplines such as Bible study, prayer, worship, and fellowship, we can ensure that our hearts are filled with good treasure, leading to speech that is edifying and beneficial to others. By doing so, we fulfill our calling to be ambassadors of Christ, spreading His love and truth through our words and actions.