Closely related

When the goodness and loving kindness of God our Savior appeared, he saved us, not because of works done by us in righteousness, but according to his own mercy. (Titus 3:4-5 ESV)

 Because God is kind and good, and has shown His kindness and goodness toward us through Jesus’ sacrificial death to atone for the guilt of our sin, we are in turn called to be kind and good to others.
 Kindness and goodness are closely related, and the terms are often used interchangeably. Both express an active desire to help meet the needs of others.
 Kindness and goodness aren’t something shown only to people we love, but to all—even someone who might be seen as an opponent or enemy, because in doing so we imitate the kindness of God. Jesus made this clear when He said: “Love your enemies, and do good, and lend, expecting nothing in return, and your reward will be great, and you will be sons of the Most High, for he is kind to the ungrateful and the evil.” (Luke 6:35)
 Of course, we’re naturally more inclined to show kindness to those we know and are close to, but the call is to develop a kind and good temperament so that we are sensitive to others and willing to do deeds which manifest love.
 As believers, we are new creations in Christ, transformed by the Holy Spirit, and called to go about and do good, as Jesus did. —Peter Amsterdam [1]

 Constant kindness can accomplish much. As the sun makes ice melt, kindness causes misunderstanding, mistrust, and hostility to evaporate. —Albert Schweitzer (1875–1965)

[1]  Activated Kindness and Goodness