The recognition of empty essence—in other words, the insight that realizes egolessness, the absence of an independent entity—is the state of original wakefulness itself. Training in this state perfects the accumulation of wisdom. During whatever formal practice you undertake, do not leave behind this accumulation of wisdom beyond reference point; rather, embrace the particular practice with the recognition of empty essence. Training in this perfects the accumulation of merit, and it does so without your having to hold on to any concepts or struggle to do so. In this way, by simply training in recognizing mind essence, you can simultaneously perfect the two accumulations of merit and wisdom.
Fearless Simplicity, p. 34