In the book "Mindfulness in Plain English," author Henepola Gunaratana explains the importance of balance in awareness and concentration during meditation. He warns that excessive awareness without maintaining a sense of calm can lead to an overstimulated state, akin to the effects of drug abuse. This condition can make one overly sensitive to stimuli, which hampers the effectiveness of meditation.

Conversely, focusing too intently without the right amount of awareness can result in what Gunaratana terms the 'Stone Buddha' syndrome. This state traps the meditator in a deep tranquility, rendering them immobile and disconnected from their practice. Both extremes are detrimental, emphasizing the need for a harmonious approach that integrates awareness and concentration for effective meditation.