If you are not careful, you can get excited about the promise and completely miss the responsibility attached to it. And this is because God often calls us into partnership with Him. Yes, some promises seem unconditional, but even then, faith and/or obedience are still involved. And that in itself is a clause. If you do not obey the clause, you will not enjoy the promise. There is no two ways about it.
If you want to eat the good of the land, then you must be willing and obedient (Isaiah 1:19). You have to obey His word, because He will speak behind you. You will hear a voice saying, “This is the way, walk in it” (Isaiah 30:21). It is in following those instructions that you begin to see the good He has already placed in the land for you.
If He says go left and you go right, how will you see the good that is on the left? He is leading you because He knows exactly where the good of the land is.