Don’t cling so tenaciously to ties of the flesh; save your constancy and ardour for an adequate cause; forbear to waste them on trite transient objects.
While earnestly wishing to erase from his mind the trace of my former offence, I had stamped on that tenacious surface another and far deeper impression, I had burnt it in.
Thus relieved of a grievous load, I from that hour set to work afresh, resolved to pioneer my way through every difficulty: I toiled hard, and my success was proportionate to my efforts; my memory, not naturally tenacious, improved with practice; exercise sharpened my wits; in a few weeks I was promoted to a higher class; in less than two months I was allowed to commence French and drawing.
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She is as tenacious as a bulldog.
a mind not gifted to discover truth but tenacious to hold it