Visuddhimagga XXI-36

Sukhena jīvitukāmassa bhīrukapurisassa ramaṇīyākārasaṇṭhitampi savāḷakamiva vanagahanaṃ, sasaddūlā viya guhā, sagāharakkhasaṃ viya udakaṃ, samussitakhaggā viya paccatthikā, savisaṃ viya bhojanaṃ, sacoro viya maggo, ādittamiva agāraṃ, uyyuttasenā viya raṇabhūmi. Yathā hi so puriso etāni savāḷakavanagahanādīni āgamma bhīto saṃviggo lomahaṭṭhajāto samantato ādīnavameva passati, evamevāyaṃ yogāvacaro bhaṅgānupassanāvasena sabbasaṅkhāresu bhayato upaṭṭhitesu samantato nirasaṃ nirassādaṃ ādīnavameva passati. Tassevaṃ passato ādīnavañāṇaṃ nāma uppannaṃ hoti. Yaṃ sandhāya idaṃ vuttaṃ –

譬如对于一位希望生活安乐而胆小的人，如虽有美丽的外表而内有猛兽的森林，如有豹子的洞窟，如有捕人的（鳄）及罗剎的河水，如举剑的敌人，如有毒的食物，如有盗贼的道路，如燃烧的炭火，如对阵的战场。譬如这（胆小的）人来到此等有猛兽的森林等，则毛骨悚立，仅见全面的过患，如是这瑜伽者由于坏随观，于现起怖畏的一切诸行中，完全无喜无乐，但见过患。如是见者，是名过患智的生起。下面是有关于此的说法：

Ñ(XXI,36): They appear as a forest thicket of seemingly pleasant aspect but infested with wild beasts, a cave full of tigers, water haunted by monsters and ogres, an enemy with raised sword, poisoned food, a road beset by robbers, a burning coal, a battlefield between contending armies appear to a timid man who wants to live in peace. And just as that man is frightened and horrified and his hair stands up when he comes upon a thicket infested by wild beasts, etc., and he sees it as nothing but danger, so too when all formations have appeared as a terror by contemplation of dissolution, this meditator sees them as utterly destitute of any core or any satisfaction and as nothing but danger.