Definition and Overview:
Kindness, in the biblical context, is an expression of love, compassion, and mercy. It is a fruit of the Spirit (Galatians 5:22) and a fundamental aspect of Christian character. As a strategic tool, kindness is employed not merely as an act of benevolence but as a deliberate means to achieve a greater purpose, often in alignment with God's will and the advancement of His kingdom.

Biblical Foundation:
The Bible provides numerous examples where kindness serves as a strategic tool. Proverbs 25:21-22 states, "If your enemy is hungry, give him food to eat; and if he is thirsty, give him water to drink. For in so doing, you will heap burning coals on his head, and the LORD will reward you." This passage illustrates how acts of kindness can disarm hostility and potentially lead to reconciliation and transformation.

Old Testament Examples:
1. Joseph and His Brothers: In Genesis 45, Joseph reveals his identity to his brothers who had sold him into slavery. Instead of seeking revenge, Joseph shows kindness by providing for them during the famine. His strategic kindness not only preserves his family but also fulfills God's plan for Israel.

2. David and Mephibosheth: In 2 Samuel 9, David seeks out Mephibosheth, the son of Jonathan, to show him kindness for Jonathan's sake. By restoring Mephibosheth's land and inviting him to eat at the king's table, David strengthens his own position by honoring his covenant with Jonathan and demonstrating loyalty and mercy.

New Testament Examples:
1. Jesus and the Samaritan Woman: In John 4, Jesus engages with the Samaritan woman at the well, breaking social norms and showing kindness by offering her "living water." This strategic act opens the door for her transformation and the spread of the Gospel among the Samaritans.

2. Paul and the Philippian Jailer: In Acts 16, after an earthquake opens the prison doors, Paul and Silas remain, preventing the jailer from taking his own life. Their kindness leads to the jailer's conversion and the baptism of his household, illustrating how kindness can be a powerful tool for evangelism.

Theological Implications:
Kindness as a strategic tool aligns with the Christian doctrine of love and grace. It reflects God's character and His redemptive plan for humanity. Romans 2:4 reminds us, "Or do you disregard the riches of His kindness, tolerance, and patience, not realizing that God’s kindness leads you to repentance?" Here, kindness is portrayed as a divine strategy to lead people to repentance and salvation.

Practical Application:
In practical terms, Christians are called to use kindness strategically in their daily interactions. This involves intentional acts of kindness that reflect Christ's love and serve as a witness to others. Whether in personal relationships, community involvement, or global missions, kindness can break down barriers, build bridges, and open hearts to the Gospel.

Conclusion:
While kindness is inherently good, its strategic use in the biblical narrative demonstrates its power to effect change, promote peace, and further God's purposes. As believers, employing kindness with intention and discernment can be a profound tool in fulfilling the Great Commission and living out the teachings of Christ.