I don't know if Christians are told not to cling on to this world but yes a Buddhist' s path is to free from attachments. However we Buddhist are not asked to obey anyone or rules. Path is shown to us and if we want to live our lives to attain Nirvana or if we don't want to find enlightenment, that's our choice. Like I once told you sir, regardless of living ones life for a goal or not , living righteous till one dies is the path I follow. Someday when I look back, I have a sense of satisfaction that I did good to the world around me.
"No one saves us but ourselves. No one can and no one may. We ourselves must walk the path" - Gautama Buddha