Sentence:  There is no <WSD>justification</WSD> for systematizing the random statements of Irenaeus about the image of God beyond this , nor for reading into his imprecise usage the later theological distinction between the image of God ( humanity ) and the similitude of God ( immortality ) . 
Meaning of the word marked with <WSD> tags:  something (such as a fact or circumstance) that shows an action to be reasonable or necessary