The kingdom of God is within you.

ਪੁਹਪ ਮਧਿ ਜਿਉ ਬਾਸੁ ਬਸਤੁ ਹੈ ਮੁਕਰ ਮਾਹਿ ਜੈਸੇ ਛਾਈ ॥
ਤੈਸੇ ਹੀ ਹਰਿ ਬਸੇ ਨਿਰੰਤਰਿ ਘਟ ਹੀ ਖੋਜਹੁ ਭਾਈ ॥੧॥
"As fragrance abides in the flower,
As the reflection is within the mirror,
So doth thy Lord abide within thee,
Why search Him without?"
- Guru Granth Sahib 684.15

الإمام علي (عليه السلام): من عرف نفسه فقد عرف ربه
"One who knows his self knows His Lord".
- Mizan al-Hikmah, hadith 12223
- Ghurar al-Hikam
- Profet Mohammed

"अहं ब्रह्मास्मि"
The core of my being is the ultimate reality, the root and ground of the universe, the source of all that exists, the infinite.
-Brihadaranyaka Upanishad 1.4.10

"Know ye not that ye are the temple of God and the spirit of God dwelleth in you?"
-Corinthians 3:16

"Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you". 

-Luke 17:21

He experiences himself, his thoughts and feelings as something separate from the rest — a kind of optical delusion of his consciousness"
- Albert Einstein