Sentence:  I have chosen to use the word `` mimesis '' in its Christian rather than its classic implications and to discover in the concrete forms of both art and myth powers of theological expression which , as in the Christian mind , are the direct consequence of <WSD>involvement</WSD> in historical experience , which are not reserved , as in the Greek mind , only to moments of theoretical reflection . 
Meaning of the word marked with <WSD> tags:  the act of sharing in the activities of a group