Sentence:  the limitations and restraints of civil government, and a legal constitution, may be defended, either from reason, which reflecting on the great <WSD>frailty</WSD> and corruption of human nature, teaches, that no man can safely be trusted with unlimited authority ; 
Meaning of the word marked with <WSD> tags:  The condition quality of being frail, physically, mentally, or morally; weakness of resolution; liability to be deceived or seduced.