Jeffrey Hopkins said this quote

Since beginners can only remain in contact with the object of observation for short periods, initially one should meditate in brief sessions even eighteen times a day; in due course stability will be achieved of its own accord, at which time the session can be lengthened. It is important not to try at first to meditate for long periods; otherwise, upon sight of the meditation cushion, one will feel nausea and laziness. The session should be left while it is going well, when one still feels that it would go well if continued.

~ Jeffrey Hopkins

Refutations of the views of inherently existent production are not just refutations of rival systems but should be taken as a branch of the process of overcoming one's own innate sense that things are inherently produced. The innate non-analytical intellect does not conceive cause and effect to be either the same, or inherently different, or both, or neither; however, if the objects that the intellect misconceives as inherently existent did in fact inherently exist, they would necessarily exist in one of these four ways. Thus, through eliminating these four possibilities, the inherently existent products that are the objects of this innate ignorance are shown to be non-existent. By attacking in this way the falsely conceived object, the falsely conceiving subject is gradually overcome. The false subject is removed by overcoming belief in the false object.

~ Jeffrey Hopkins