4. Cheonbugyeong_il jeok sip geo mu gwe hwa sam

[一積十鉅 無匱化三]
[일적십거무궤화삼, il jeok sip geo mu gwe hwa sam]
One accumulates and opens as Ten without deficiency due to Three's creative change.

How is the ultimate goal of Heaven, Earth, and Humanity to be achieved?
Cheonbugyeong shows that it will be fulfilled by opening the world of number 10. Ten is considered the number of perfection or completion of God's “divine order.”

Pythagoras said "In the spiritual significance of numbers, 10 is seen as a complete and perfect number. It contains the essence of both 1 (the beginning) and 0 (the void)."

According to Shuowen Jiezi, the number 10 (十) means that everything is perfectly sufficient. The horizontal line ㅡ is east-west, and the vertical line ㅣ is north-south, so it has all four directions and the center. 

Han, Dong-seok, an author of 'The Principle of Cosmic Change and Transformation' mentioned that Numbers were not created arbitrarily by humans for calculation purposes; numbers themselves are truth and philosophy. All images represented by numbers are not illusions but reality. ,,, The number 10 (十) has the image of the yin (ㅡ) and the yang (ㅣ) intersecting at the central point. Therefore, 10 (十) can only be a property in which yin and yang are perfectly equal and thus yin and yang are neutralized.

Ironically, the cross, the symbol of Christianity is number 10 in Eastern culture.