"Moral Decay" (1937); Later published in Out of My Later Years (1950) 
1930s 
Context: All religions, arts and sciences are branches of the same tree. All these aspirations are directed toward ennobling man's life, lifting it from the sphere of mere physical existence and leading the individual towards freedom. It is no mere chance that our older universities developed from clerical schools. Both churches and universities — insofar as they live up to their true function — serve the ennoblement of the individual. They seek to fulfill this great task by spreading moral and cultural understanding, renouncing the use of brute force.
The essential unity of ecclesiastical and secular institutions was lost during the 19th century, to the point of senseless hostility. Yet there was never any doubt as to the striving for culture. No one doubted the sacredness of the goal. It was the approach that was disputed.
                                    
“Teachers, not students, are the ones who are failing. As Albert Einstein said that “all religions, arts and sciences are branches of the same tree,” the detachment of philosophy – the forefather of all knowledge and academic disciplines – from mathematics, sciences, and technology is the fundamental reason for failure in modern-day K-12 and higher education.”
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Newton Lee 236
American computer scientistRelated quotes
Robert Chambers, Chambers's Information for the People (1875) Vol. 2 https://books.google.com/books?id=vNpTAAAAYAAJ
Lectures on Philosophy of Religion, Volume 1 (1827)
Pure Phenomenology, 1917
“Mathematical activity has taken the forms of a science, a philosophy and an art.”
100 Years of Mathematics: a Personal Viewpoint (1981)
                                        
                                        Subjectively speaking, the essence of philosophy is certitude; for the moderns, on the contrary, the essence of philosophy is doubt: the philosopher is supposed to reason without any premise (voraussetzungsloses Denken), as if this condition were not itself a preconceived idea; this is the classical contradiction of all relativism. Everything is doubted except for doubt. The solution to the problem of knowledge − if there is a problem − could not possibly be this intellectual suicide that is the promotion of doubt; on the contrary, it lies in having recourse to a source of certitude that transcends the mental mechanism, and this source − the only one there is − is the pure Intellect, or Intelligence as such. 
[2005, The Transfiguration of Man, World Wisdom, 3, 978-0-94153219-8] 
Miscellaneous, Philosophy
                                    
                                        
                                        p 14 
Simon Stevin: Science in the Netherlands around 1600, 1970
                                    
Faith for Living (1940)