Luke 17:21, 24 “Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you. ... For as the lightning, that lighteneth out of the one [part] under heaven, shineth unto the other [part] under heaven; so shall also the Son of man be in his day.”

The kingdom of God is within you. Heaven is with you. The light-ning shines within you.

Luke 17:20 “And when he was demanded of the Pharisees, when the kingdom of God should come, he answered them and said, The kingdom of God cometh not with observation:”

It says the “coming” is not observed with ocular evidence (i.e. observation with the physical eyes). 

Matthew 16:25, 27-28 “For whosoever will save his life shall lose it: and whosoever will lose his life for my sake shall find it. ... For the Son of man shall come in the glory of his Father with his angels; and then he shall reward every man according to his works. Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom.”

You will not “taste of death” until you see the Son of man coming in his kingdom which is within you; because you have to lose “your” life to save it.  You have to let yourself (i.e bad thought habits) go in order to “taste of death”, which causes his “coming”. “I protest by your rejoicing which I have in Christ Jesus our Lord, I die daily (1 Corinthians 15:31). We taste of death and therefore “die daily” to allow Christ to come within. We lose ourselves (i.e. ego self, first born, etc.) to find Christ within.  And you have to “work” at it to get rewarded.

Hebrews 9:28 “So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.”

But we have to look for him in order to find him, because he only “comes” to those who seek. He only appears to those who will look for him. But remember this “appearance” is not with observation of the physical eyes. Because also;

John 9:39, 41 “And Jesus said, For judgment I am come into this world, that they which see not might see; and that they which see might be made blind. ... Jesus said unto them, If ye were blind, ye should have no sin: but now ye say, We see; therefore your sin remaineth.”

When he comes it is “without sin” (Heb 9) because when you are “blind” to sin, then ye shall truly “see” and have the true judgment of Christ, and he shall “rule” your kingdom within.

Galatians 4:19 “My little children, of whom I travail in birth again until Christ be formed in you,..” 

Our “woman” within travails to give birth (second born, born again, etc.), to in turn show us his glory.

Colossians 1:27 “To whom God would make known what [is] the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:”