For the meaning of Eminent - expansion. Harvest - determination click HERE
Image: 'Weaponry out of sight' might allude to King Wen after the conquest: he wrapped up the shields and spears and and made it known he would no more have recourse to wapons of war (see Marshall). 'Alert for danger' might be: 'alert and not anxious'.
Line 1. 'To the end' might be: is not the end. Line 2. 'Then': the original meaning was 'your'.
Line 5. The "not" is a very strong one. Like NOT!! or not at all.
Line 6. 'Moan', other meanings: to give, sigh, pay tribute. 'Sigh', other meaning: consult.