References – AN 3.137: A Hair Blanket 
“Is the Buddha quoted as saying “I teach a path of the application of effort?”” Answered by Ajahn Pasanno. [Buddha] [Energy] [Right Effort] [Eightfold Path] // [Aids to Awakening]
Sutta: AN 3.137: Doctrine of energy (vīriyavādā)
Sutta: DN 16: Mahāparinibbāna Sutta
The Four Foundations of Mindfulness [2015], Session 15, Excerpt 2
“What technique to use to realize the fruits of this practice in this life? What technique is easiest and most effective?” Answered by Ajahn Pasanno. [Meditation/Techniques ] [Stages of awakening] // [Ardency] [Energy] [Right Effort] [Learning] [Practicing in accordance with Dhamma]
Quote: “I can guarantee that looking for the easiest way is the least effective way.”
Quote: “Practice is one mistake after another.” — Dōgen. [Dōgen]
Story: Someone asks the Dalai Lama, “What is the easiest and quickest way to realize emptiness?” The Dalai Lama cries. [Dalai Lama] [Emptiness] [Fierce/direct teaching]
Sutta: AN 3.137: A teaching of effort.