The current connection between He Ao and the Life Goddess was at such a level that it was indeed possible for the Life Goddess to casually send an 'Oracle.' However, monitoring his soul and thoughts would require expending additional power to strengthen the link.
He Ao did not sense the Life Goddess attempting to strengthen the connection, nor did he feel any overt signs of contamination from the Divine Being seeping into his body.
According to the agreement between He Ao and the Life Goddess, She would not monitor his thoughts or actions.
The promises of a Divine Being carry a weight rooted in mysticism, and with their repeated collaborations, He Ao believed that the Life Goddess would not easily break their covenant.
The 'perception' of the 'Saint' state was likely built upon the faint connection they already shared.
He Ao could sense the existence of the Life Goddess, and the Life Goddess could also perceive whether Her 'Saint' was 'dead' or 'alive.'
