You know what everything has some limits you have some limits I have some limits For eg. If we buy something from marker it have date like " best before" but try yourself not to bound from this .We know that man is superior from all the forms of life. Don't live only for your basic requirements like food ,clothing and shelter you know what.. even dogs fullfill their basic requirements if you live only for basic requirements so what is the difference between you and a stray dog. Don't limit yourself . At last I want to say that "A door is smaller than a house,the lock on the door even smaller,the key being the smallest, yet it is the key that unlock the door into the house"