He is God of time.

I start with a question my brethren, why did it take seven years for Jacob to get Leah and another seven to marry Rachel? is it because he was poor? remember his father was Isaac the richest, who inherited wealth from Abraham.He would have done it like his father, go to Laban with precious expensive gifts and marry Rachel straight away, dont you think God was working out somethings here, again dont forget he is going to be a father of the twelve sons who will build the twelve tribes of Israel.This person need to be strong and mature.His mother again told him stay there untill your Brother Esau's anger cools down.

I believe there are so many good reasons why our promises are delaying.
May be we are just not ready yet to handle our responsibilities, for Jacob it was to be a father of Israel nation, to you brother reading this it may be being a leader of a nation, an organisation, a region(like Euro,Africa,Asia etc) plus many other assignments.
The other reason for the delay might be the battle with our enemies is still fierce,God is sorting out our enemies first remember this kind of battle he said is his, Jacob was waiting for Esau's anger to cool down but who does that to him? i know people can take their life time to forgive so it takes the grace of God. He said Pharaoh's heart is in my hand, i can soften his heart to release the Israelites.

He is God of time and his time is good, our miracles are God's important assignments which he wants us to do, that is why he is watching over them to fulfill them.