"In nature may always be found something to divert the attention of the sick from themselves and direct their thoughts to God. Surrounded by His wonderful works, their minds are uplifted from the things that are seen to the things that are unseen. The beauty of nature leads them to think of the heavenly home, where there will be nothing to mar the loveliness, nothing to taint or destroy, nothing to cause disease or death. MH 265.3"
"While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal."
The EGW passage directly reflects the principle of focusing on the unseen (spiritual) rather than the seen (temporal), as stated in 2 Corinthians 4:18. The passage explicitly mentions directing thoughts to God and the heavenly home.