“God withholds Himself from no one who perseveres.”

Astronomica

I.
Outline of the Doctrine of Knowledge (1810)
Context: The Doctrine of Knowledge, apart from all special and definite knowing, proceeds immediately upon Knowledge itself, in the essential unity in which it recognises Knowledge as existing; and it raises this question in the first place — How this Knowledge can come into being, and what it is in its inward and essential Nature?
The following must be apparent: — There is but One who is absolutely by and through himself, — namely, God; and God is not the mere dead conception to which we have thus given utterance, but he is in himself pure Life. He can neither change nor determine himself in aught within himself, nor become any other Being; for his Being contains within it all his Being and all possible Being, and neither within him nor out of him can any new Being arise.

As quoted in Simón Bolívar (1969) by Gerhard Masur
Context: Do not compare your material forces with those of the enemy. Spirit cannot be compared with matter. You are human beings, they are beasts. You are free, they are slaves. Fight, and you shall win. For God grants victory to perseverance.

Source: 1840s, Philosophical Fragments (1844), p. 76

Ich glaube an Spinozas Gott, der sich in der gesetzlichen Harmonie des Seienden offenbart, nicht an einen Gott, der sich mit Schicksalen und Handlungen der Menschen abgibt.
24 April 1929 in response to the telegrammed question of New York's Rabbi Herbert S. Goldstein: "Do you believe in God? Stop. Answer paid 50 words." Einstein replied in only 27 (German) words. The New York Times 25 April 1929 http://select.nytimes.com/gst/abstract.html?res=F10B1EFC3E54167A93C7AB178FD85F4D8285F9
Similarly, in a letter to Maurice Solovine, he wrote: "I can understand your aversion to the use of the term 'religion' to describe an emotional and psychological attitude which shows itself most clearly in Spinoza... I have not found a better expression than 'religious' for the trust in the rational nature of reality that is, at least to a certain extent, accessible to human reason."
As quoted in Einstein : Science and Religion http://www.einsteinandreligion.com/spinoza.html by Arnold V. Lesikar
1920s

Albert Einstein, in response to the telegrammed question of New York's Rabbi Herbert S. Goldstein in (24 April 1929) ; he later expanded on his comments about Spinoza's and his own ideas on religion elsewhere : "I can understand your aversion to the use of the term "religion" to describe an emotional and psychological attitude which shows itself most clearly in Spinoza … I have not found a better expression than "religious" for the trust in the rational nature of reality that is, at least to a certain extent, accessible to human reason." — as quoted in Einstein : Science and Religion by Arnold V. Lesikar
A - F

The Computerworld Smithsonian Awards Program Oral History Interview http://americanhistory.si.edu/comphist/sj1.html, Advice for Future Entrepreneurs (20 April 1995)
1990s
Context: I'm convinced that about half of what separates the successful entrepreneurs from the non-successful ones is pure perseverance. It is so hard. You put so much of your life into this thing. There are such rough moments in time that I think most people give up. I don't blame them. Its really tough and it consumes your life. If you've got a family and you're in the early days of a company, I can't imagine how one could do it. I'm sure its been done but its rough. Its pretty much an eighteen hour day job, seven days a week for awhile. Unless you have a lot of passion about this, you're not going to survive. You're going to give it up. So you've got to have an idea, or a problem or a wrong that you want to right that you're passionate about otherwise you're not going to have the perseverance to stick it through. I think that's half the battle right there.

Source: Metamorphoses

Genesis 3:8
The Sinfulness of Sin