‘Inside’ is the mirror of ‘outside’.
The male energy (yang) sends out a few million scouts searching for an empty universe full of consciousness in which there is still nothing to be conscious of and the female energy, the receptive (yin) possesses that empty universe full of consciousness. The meeting of energy and consciousness creates a Big Bang and because of that a living universe is born.
In other words;
The moment the spermatozoid and ovule unite and time and space separate, the adventure, back to unity begins.