Mahatma Gandhi often used to say, One must care about a world one will not see. This means that it is our duty to be concerned about the world which we shall not see and to care for that.
महात्मा गाधी जी कई बार कहते थे  ne must care about a world one will not see अर्थात् हम जो दुनिया नहीं देखेंगे, हमारा कर्त्तव्य है कि हम उसकी भी चिंता करें, हम उसकी भी care करें।