For the meaning of Eminent - expansion. Harvest - determination click HERE
Line 3. It says 'without probing harvest', so this could also mean: without probing yet there will be harvest. And even: Sweet nearing without probing. Harvest: already grieving over it.
Line 5. 'Style' translates yi, a sacrifice at the earth altar (see Marshall 'Mandate of Heaven'). Nearing like a great prince does for the sacrifice. In old texts Lin is used for 'descending to the valley'. That was coming (back) to the village, were the people live. I think the other meanings were derived from that. It is used now for approaching a moment or point. In science: the critical point (f.e. the critical temperature) and for nearing a point or line (two lines nearing each other by a formula, the distance becomes immeasurably small, but never zero). And for nearing death, for mourning and sickness: the vertical eye looks down on a person.
Hex.19 and 20 are a pair: 20 is observing and seeing, 19 is looking and acting or looking with care.