Humble yourselves, therefore, under God's mighty hand, that he may lift you up in due time. (1 Peter 5:6)
There are ample examples in the Word of God where this promise has already been fulfilled. Humbling is not very easy as we can see in the lives of the Israelites who left Egypt for the God promised land of Canaan, but since Canaan was a promise and since the Israelites would not humble themselves, God humbled them as is written in the verses below.
"Remember how the LORD your God led you all the way in the desert these forty years, to humble you and to test you in order to know what was in your heart, whether or not you would keep his commands.
He humbled you, causing you to hunger and then feeding you with manna, which neither you nor your fathers had known, to teach you that man does not live on bread alone but on every word that comes from the mouth of the LORD. (Deuteronomy 8:2,3)
Have you been called by God to be a member of his heavenly kingdom? Better to humble yourself under God's mighty hand than to have him humble you. And if you do humble yourself by obeying his Word and doing his will, he will lift you up in due time. God bless.