"Parents, let the sunshine of love, cheerfulness, and happy contentment enter your own hearts, and let its sweet, cheering influence pervade your home. Manifest a kindly, forbearing spirit; and encourage the same in your children, cultivating all the graces that will brighten the home life. The atmosphere thus created will be to the children what air and sunshine are to the vegetable world, promoting health and vigor of mind and body. MH 387.1"
"And be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ’s sake hath forgiven you."
Both passages encourage kindness, tenderness, and forgiveness. The EGW passage applies these principles specifically to the home environment, while the Bible verse is a more general exhortation. The connection is clear and direct.