“Thou shalt prove how salt is the taste of another man's bread and how hard is the way up and down another man's stairs.”
Canto XVII, lines 58–60 (tr. Sinclair).
The Divine Comedy (c. 1308–1321), Paradiso
Original
Tu proverai sì come sa di sale | lo pane altrui, e come è duro calle | lo scendere e 'l salir per l'altrui scale.
XVII, 58-60
Variant: Tu proverai sì come sa di sale
lo pane altrui, e come è duro calle
lo scendere e 'l salir per l'altrui scale.
Help us to complete the source, original and additional information
Dante Alighieri 105
Italian poet 1265–1321Related quotes

“166. Of all smells, bread; of all tasts, salt.”
Jacula Prudentum (1651)

Remarks in New York City at a Reception for Delegates to the State Republican Convention http://www.reagan.utexas.edu/archives/speeches/1982/61782e.htm (17 June 1982), this is a restatement of "The Eleventh Commandment" by California Republican Party Chairman Gaylord Parkinson, which Reagan first used in 1966
1980s, First term of office (1981–1985)

Du sollst dir kein Ideal machen, weder eines Engels im Himmel, noch eines Helden aus einem Gedicht oder Roman, noch eines selbstgeträumten oder fantasirten; sondern du sollst einen Mann lieben, wie er ist.
Philosophical Fragments, P. Firchow, trans. (1991), “Athenaeum Fragments,” § 364

Source: 2000s, Promises to Keep (2008), Page 208

“Man know thyself; then thou shalt know the Universe and God.”
As quoted in Fragments of Reality: Daily Entries of Lived Life (2006) by Peter Cajander, p. 109
Letter to Charles II of England (25 November 1675)
An Apology for the True Christian Divinity (1678)
Context: There is no king in the world, who can so experimentally testify of God's providence and goodness; neither is there any who rules so many free people, so many true Christians: which thing renders thy government more honorable, thyself more considerable, than the accession of many nations filled with slavish and superstitious souls.
Thou hast tasted of prosperity and adversity; thou knowest what it is to be banished thy native country, to be overruled as well as to rule and sit upon the throne; and being oppressed, thou hast reason to know how hateful the oppressor is both to God and man. If after all these warnings and advertisements thou dost not turn unto the Lord with all thy heart, but forget him who remembered thee in thy distress and give up thyself to follow lust and vanity, surely great will be thy condemnation.
Against which snare, as well as the temptation of those that may or do feed thee and prompt thee to evil, the most excellent and prevalent remedy will be to apply thyself to that Light of Christ, which shineth in thy conscience, which neither can nor will flatter thee nor suffer thee to be at ease in thy sins, but doth and will deal plainly and faithfully with thee as those that are followers thereof have also done.
God Almighty, who hath so signally hitherto visited thee with his love, so touch and reach thy heart, ere the day of thy visitation be expired, that thou mayest effectually turn to him so as to improve thy place and station for his name.