Yogi: When the mind says it knows how to meditate, how do we check that the mind is not bluffing?

Sayadaw: You look at the result. If the mind is relaxed, light, peaceful and free – and there are understanding, samadhi and awareness – then you know that the mind knows the way. When what you do is right, the result must be good; this is cause and effect. 

If the mind becomes very tired, tense, or boring, then you are not meditating correctly. 

It’s like knowing how to make money – if you know how to make money, there must be money in your pocket.