"If we would have our homes the abiding place of health and happiness we must place them above the miasma and fog of the lowlands, and give free entrance to heaven's life-giving agencies. Dispense with heavy curtains, open the windows and the blinds, allow no vines, however beautiful, to shade the windows, and permit no trees to stand so near the house as to shut out the sunshine. The sunlight may fade the drapery and the carpets, and tarnish the picture frames; but it will bring a healthy glow to the cheeks of the children. MH 275.3"
"The light of the eyes rejoiceth the heart: and a good report maketh the bones fat."
Both passages connect light (sunlight in EGW, 'light of the eyes' in Proverbs) with positive effects on health and well-being. The EGW quote expands on the practical application of this principle in the home, while Proverbs offers a more general observation. The connection is valid.
"Those who have the aged to provide for should remember that these especially need warm, comfortable rooms. Vigor declines as years advance, leaving less vitality with which to resist unhealthful influences; hence the greater necessity for the aged to have plenty of sunlight, and fresh, pure air. MH 275.4"
"Thou shalt rise up before the hoary head, and honour the face of the old man, and fear thy God: I am the Lord."
Both passages address the care and consideration due to the elderly. The Leviticus verse commands respect for the elderly, while the EGW quote specifies practical ways to care for their needs, particularly regarding their living environment. The EGW quote directly applies the principle of honoring the elderly.