The most potent things in life are very simple. Love, happiness, peace, sleep.
But the mind likes to grasp and control things. Simplicity confounds it.
Yet simplicity is a marker of universal principles. Karma or action would be a good example. The rules of action are very simple. For example, for every action there is an equal and opposite reaction. The energy of nature is always seeking a balance of forces. Balance keeps the world sustained.
But in its expression, karma is complex beyond imagining. Unfathomable, as the Bhagavad Gita puts it.
Simplicity is also the hallmark of the most potent techniques. Effortless meditation, samyama, allowing, and releasing are all very simple. The biggest issue is usually the mind getting involved. This is why going beyond the mind into pure simplicity is so beneficial.
KISS – Keep it simple, smarty.