Sentence:  ... if a Man can be persuaded and fully assur'd of anything for a truth, without having examin'd what is there that he may not <WSD>embrace</WSD> for truth ... what means is there left to recover one who can be assur'd without examining? 
Meaning of the word marked with <WSD> tags:  To seize (something) eagerly, or with alacrity; to accept with cordiality; to welcome.