Be kind to one another, tender-hearted, forgiving each other, just as God in Christ also has forgiven you. (NASB)
And become useful and helpful and kind to one another, tenderhearted (compassionate, understanding, loving-hearted), forgiving one another [readily and freely], as God in Christ forgave you. (AMP)
Let there be no more resentment, no more anger or temper, no more violent self-assertiveness, no more slander and no more malicious remarks, Be kind to each other, be understanding. Be as ready to forgive others as God for Christ’s sake has forgiven you. (Phillips)
Make a clean break with all cutting, backbiting, profane talk. Be gentle with one another, sensitive. Forgive one another as quickly and thoroughly as God in Christ forgave you. (Message)
The verses share the message. Our marriages will thrive when we are kind to one another, quick to forgive, helpful, compassionate, understanding and gentle. These qualities will flow out of our hearts if our hearts belong to God. This is why it is so important to marry a fellow believer in Christ who has a personal relationship with our Father. It is difficult for non-believers to be quick to forgive because they have yet to receive forgiveness.