How Jesus said, the Kingdom of God would come soon.
Jesus said to seek first the kingdom of God in His Sermon on the Mount ... We are to seek the things of God as a priority over the things of the world. When Jesus returns, there will indeed be dramatic signs that all will be able to discern (Matthew 24:5-14, 21-27; Revelation 1:7). But in saying, "The kingdom of God does not come with observation; nor will they say, 'See here!' or 'See there!'" (Luke 17:20-21), Jesus was explaining to the Pharisees of that generation that, in spite of their meticulous efforts, their mistaken understanding would not allow them to identify the Messiah's first coming.
Finally, does this passage indicate that if we seek the kingdom of God all the things we worry about will be fixed? No, it does not. The concept that seeking God's kingdom is a means by which to promote earthly comfort is an erroneous preaching present in certain evangelical circles, and is referred to as the prosperity gospel. Again, the context of Matthew 6:33 is important, for the next sentence Jesus speaks is, "Therefore do not be anxious about tomorrow" (Matthew 6:34). Seeking God's kingdom does not mean the rest of life will be "fixed," but it does mean that we can have the surety necessary to keep in perspective the power of God over our lives, reducing our need to worry.