A meaning for the word kingdom is 'the eternal spiritual sovereignty of God.' Spiritual means 'not material' and 'sovereignty' means, 'complete authority and power.'
If a meaning for 'material' is matter' then we need to understand 'matter.' One meaning for the word 'matter' is 'the actual substance of a thought and the expression of the thought.'
This could explain why God has no control in... 'this world of mental phenomenon.'
Because it doesn't appear God does have much control over 'this world.' Maybe its because this world is a 'mental phenomenon.'
Kingdom is a 'realm in which one thing is dominate.' So that alone tells you that since 'this world' has so many things that are 'dominate,' 'this world' cannot be the 'kingdom of God.'
What’s in Gods Kingdom? God and the word God is defined as a, 'vital force.' Force is an 'intelligent power.' In God's Kingdom you find a VITAL INTELLIGENT FORCE. Not things with forms.
Okay...so where is this Kingdom?
DEEP WITHIN THE SILENCE WITHIN YOU