Ajahn Dhammasiha explains that 'attaining' samādhi is not just a questions of technique or sitting a lot. The crucial factor is the suspension of the 5 hindrances:

We have to consistently work against these 5 hindrances, in our formal meditation as well as in daily life, to weaken them to such an extend that our heart can experience the rapture and bliss resulting from their abandonment.

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