"God has made every thing beautiful in it's time. He has also set eternity in the hearts of men; Yet they cannot fathom what God has done from beginning to the end."
Ecclesiastes 3:11, said by King Solomon, who lacked nothing in this world.
This means we are never going to be satisfied with earthly pleasures and pursuits. Because we are created in God's image, we have a spiritual thirst. We have eternal value and nothing but the eternal God can satisfy us.
"He has built in us a restless yearning for the kind of perfect world that can only be found in a perfect rule. He has given us a glimpse of of the perfection of his creation. But it is only a glimpse, we cannot see into the future or comprehend every thing. So we must trust Him now and do his work on earth." [From the Life application study bible]
I find this quite true. I don't think any one could deny or debate it. God has, in a simple way, stipulated how we ought to live; in His word and how his kingdom will be established in our hearts. As we implicitly obey whatever He says, things will become clear. Submission and obedience are essential for spiritual growth. Till we reach the character of God, which is His image, no one or nothing else can satisfy us.
Holy spirit, our helper, guide us till we reach that stage, is my prayer today.