Sentence:  [A]midst so many vicissitudes of fortune to which I have been exposed, amongst all the goods and evils, the joyful and gloomy, the pleasing and disagreeable circumstances of life, thou [God] <WSD>endowest</WSD> me with an equal, constant, manly, and superior spirit on every occasion. 
Meaning of the word marked with <WSD> tags:  "Followed by" '''(with)''', "or rarely by" '''(of)''': to enrich or furnish with some faculty or quality.