“For the things that are seen are temporal, but things that are unseen are eternal.”
“Q3 Is there any knowledge of things unseen, or not?”
Sic et Non (1120)
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Peter Abelard 20
French scholastic philosopher, theologian and preeminent lo… 1079–1142Related quotes

“Reality of things is hidden in the realm of the unseen”
Source: Purification of the Heart: Signs, Symptoms and Cures of the Spiritual Diseases of the Heart

The Monetary Conference of the American Republics (1891)
Context: It is not the form of things that must be attended to but their spirit. The real is what matters, not the apparent. In politics, reality is that which is unseen. Politics is the art of combining a nation’s diverse or opposing factors to the benefit of its domestic well-being, and of saving the country from the open enmity or covetous friendship of other nations.

Preface
Problems In Genetics (1913)
Context: Few who are familiar with the facts that genetic research has revealed are now inclined to speculate as to the manner by which the process [species come into existence] has been accomplished. Our knowledge of the nature and properties of living things is far too meagre to justify any such attempts. Suggestions of course can be made: though, however, these ideas may have a stimulating value in the lecture room, they look weak and thin when set out in print.
“What unseen pen etched eternal things
on the hearts of human kind
but never let them in our minds?”
My Exit, Unfair.
Catch For Us The Foxes (2004)

the necessary and sufficient conditions for rational knowledge
Source: Great Islamic Encyclopedia website, 2016 https://www.cgie.org.ir/fa/news/154958

Notes from Devotional Authors of the Middle Ages (1873-1874)
Context: Mysticism: to dwell on the unseen, to withdraw ourselves from the things of sense into communion with God — to endeavour to partake of the Divine nature; that is, of Holiness. When we ask ourselves only what is right, or what is the will of God (the same question), then we may truly be said to live in His light.