Buddhadasa Bhikkhu
Buddhadasa Bhikkhu was a Thai Buddhist monk and an influential ascetic-philosopher of the 20th century. Known as an innovative reinterpreter of Buddhist doctrine and Thai folk beliefs, Buddhadasa fostered a reformation in conventional religious perceptions in Thailand as well as abroad. Buddhadasa developed a personal view that those who have penetrated the essential nature of religions consider 'all religions to be inwardly the same', while those who have the highest understanding of dhamma feel 'there is no religion'.
“Those who read books cannot understand the teachings and, what's more, may even go astray. But those who try to observe the things going on in the mind, and always take that which is true in their own minds as their standard, never get muddled. They are able to comprehend suffering, and ultimately will understand Dharma. Then, they will understand the books they read.”
Buddhadasa Bhikkhu