In plain words
The kuṇḍalinī śakti, which starts from the mūlādhāra, goes up into the sahasrāra and blossoms. For it the vital breath is the main thing. That very vital breath is Prema. This Prema must begin as the vital breath in the mūlādhāra and open out in the sahasrāra. Many people in this modern age must recognise, scientifically, the principle of Ardhanārīśvara in this. No scientist explains this. We can reflect on how close a relation there is between the principle of Ardhanārīśvara the ancients speak of and the term today's scientists use.
Every single thing in the world is a form of atoms!
There are many more things like this. Matter is built of atoms. In every atom there are two forces called protons and electrons. Electrons are like negative poles. Protons are positive poles. In electrons lies the female principle. In protons lies the male (masculine) principle. Ardhanārīśvara means half woman, half man. All that is called electrons is the female principle. Protons are the male principle. These two come together to form the atom. Every thing in the world is a form of atoms! So our ancestors declared that the whole world too is the principle of Ardhanārīśvara.
In the same way, if we examine some subtle matters by science: on our festival days in Bhārata, at weddings, or whenever they perform any other auspicious rite, people tie green festoons of mango leaves on the doorways. Along with them they also tie up plantain stems. What is the inner meaning of this? ‘The people of Bhārata foolishly hang up all sorts of silly things. All these wither quickly. Instead of these, wouldn't it be better to hang plastic festoons that always look fresh!’ so they say. Why cut the branches off a tree at all? It would do to tie these up, wouldn't it! So say the great intellectuals and scientists of today.
Our ancestors were men of great intellect. They knew the secrets of science. Divine ideas lie hidden within the things they did and fill them.