Love is the Law. It's how things work. Love is the Light and it underlies all...Everything was made by Love and Love is what we are becoming.
That said, we live in a world of choice. We are always either participating in Giving (higher nature, Love, selflessness), or taking (lower nature, fear, selfishness...astral illusion). Not just in our actions but also in our thoughts and emotions - our states of being.
And we evolve from lower to higher nature over many, many lifetimes.
It is not hard to see that delusion is everywhere on planet earth: the religious all think their religion is the only path to God, greed is a delusion that it is creating huge poverty, racism is a widespread collective delusion, and so is the objectification of women.
Delusion is the atmosphere we live in today. The truth is we are just beginning to wake up - we don’t yet have clear, discerning minds that can easily tell truth from lies.
So with all that delusion going on, we can safely assume that we aren’t yet able to easily discern a real spiritual teacher from one who just wears the clothes and talks the talk.