Most parents want to 'shelter' their children 'from' pain and sadness. [=to prevent their children from experiencing pain and sadness]
They 'found/took shelter' in a cave during the storm. [=they went into a cave to get out of the storm]
They were accused of 'sheltering' a criminal. [=giving a criminal a place to hide]
(..) l should feel obliged. Thank you. And that would be unconscionable l suppose, wouldn't it? To feel any obligation. Yes, of course it would. You should come into the shelter. l'm quite all right thank you. - Look over there. - What am l looking at? Do you see what's happening to them (..)1996 The English Patient